2231115840 has 140 divisors (see below), whose sum is σ = 7936563756. Its totient is φ = 594957312.

The previous prime is 2231115839. The next prime is 2231115847. The reversal of 2231115840 is 485111322.

It can be written as a sum of positive squares in 2 ways, for example, as 780420096 + 1450695744 = 27936^2 + 38088^2 .

It is a super-3 number, since 3×2231115840³ (a number of 29 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (2231115847) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 17119 + ... + 68958.

Almost surely, 2^2231115840 is an apocalyptic number.

2231115840 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 2231115840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3968281878).

2231115840 is an abundant number, since it is smaller than the sum of its proper divisors (5705447916).

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

2231115840 is an equidigital number, since it uses as much as digits as its factorization.

2231115840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86106 (or 86087 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 2231115840 is about 47234.6889478485. The cubic root of 2231115840 is about 1306.6944299714.

The spelling of 2231115840 in words is "two billion, two hundred thirty-one million, one hundred fifteen thousand, eight hundred forty".