2102331231 has 288 divisors, whose sum is σ = 4598088768. Its totient is φ = 905748480.

The previous prime is 2102331223. The next prime is 2102331233. The reversal of 2102331231 is 1321332012.

2102331231 is a `hidden beast` number, since 2 + 102 + 331 + 231 = 666.

It is not a de Polignac number, because 2102331231 - 2³ = 2102331223 is a prime.

It is a super-2 number, since 2×2102331231² = 8839593209675950722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102331233) by changing a digit.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 39666601 + ... + 39666653.

It is an arithmetic number, because the mean of its divisors is an integer number (15965586).

Almost surely, 2^2102331231 is an apocalyptic number.

2102331231 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2102331231 is an abundant number, since it is smaller than the sum of its proper divisors (2495757537).

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

2102331231 is a wasteful number, since it uses less digits than its factorization.

2102331231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151 (or 141 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 2102331231 is about 45851.1857098592. The cubic root of 2102331231 is about 1281.0528509951.

Adding to 2102331231 its reverse (1321332012), we get a palindrome (3423663243).

It can be divided in two parts, 2102 and 331231, that added together give a palindrome (333333).

The spelling of 2102331231 in words is "two billion, one hundred two million, three hundred thirty-one thousand, two hundred thirty-one".