31233165140 has 24 divisors (see below), whose sum is σ = 65772362880. Its totient is φ = 12458463008.

The previous prime is 31233165133. The next prime is 31233165191. The reversal of 31233165140 is 4156133213.

It is a super-2 number, since 2×31233165140² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2167832 + ... + 2182191.

It is an arithmetic number, because the mean of its divisors is an integer number (2740515120).

Almost surely, 2^31233165140 is an apocalyptic number.

It is an amenable number.

31233165140 is an abundant number, since it is smaller than the sum of its proper divisors (34539197740).

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

31233165140 is a wasteful number, since it uses less digits than its factorization.

31233165140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4350391 (or 4350389 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 29.

Adding to 31233165140 its reverse (4156133213), we get a palindrome (35389298353).

The spelling of 31233165140 in words is "thirty-one billion, two hundred thirty-three million, one hundred sixty-five thousand, one hundred forty".