2231097520 has 80 divisors (see below), whose sum is σ = 5528217600. Its totient is φ = 835442432.

The previous prime is 2231097511. The next prime is 2231097529. The reversal of 2231097520 is 257901322.

2231097520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2231097511) and next prime (2231097529).

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-3 number, since 3×2231097520³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (2231097529) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73581 + ... + 99379.

It is an arithmetic number, because the mean of its divisors is an integer number (69102720).

Almost surely, 2^2231097520 is an apocalyptic number.

2231097520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2231097520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2764108800).

2231097520 is an abundant number, since it is smaller than the sum of its proper divisors (3297120080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2231097520 is a wasteful number, since it uses less digits than its factorization.

2231097520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25882 (or 25876 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 2231097520 is about 47234.4950221763. The cubic root of 2231097520 is about 1306.6908534789.

Adding to 2231097520 its reverse (257901322), we get a palindrome (2488998842).

The spelling of 2231097520 in words is "two billion, two hundred thirty-one million, ninety-seven thousand, five hundred twenty".