2231135520 has 96 divisors (see below), whose sum is σ = 7218082368. Its totient is φ = 578884608.

The previous prime is 2231135507. The next prime is 2231135527. The reversal of 2231135520 is 255311322.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-3 number, since 3×2231135520³ (a number of 29 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (2231135527) 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, 45054 + ... + 80573.

It is an arithmetic number, because the mean of its divisors is an integer number (75188358).

Almost surely, 2^2231135520 is an apocalyptic number.

2231135520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2231135520 is an abundant number, since it is smaller than the sum of its proper divisors (4986946848).

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

2231135520 is a wasteful number, since it uses less digits than its factorization.

2231135520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125682 (or 125674 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 2231135520 is about 47234.8972688626. The cubic root of 2231135520 is about 1306.6982719460.

Adding to 2231135520 its reverse (255311322), we get a palindrome (2486446842).

The spelling of 2231135520 in words is "two billion, two hundred thirty-one million, one hundred thirty-five thousand, five hundred twenty".