3131230440 has 64 divisors (see below), whose sum is σ = 10116288000. Its totient is φ = 770764032.

The previous prime is 3131230433. The next prime is 3131230441. The reversal of 3131230440 is 440321313.

It is not an unprimeable number, because it can be changed into a prime (3131230441) 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, 1002040 + ... + 1005159.

It is an arithmetic number, because the mean of its divisors is an integer number (158067000).

Almost surely, 2^3131230440 is an apocalyptic number.

3131230440 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3131230440 is an abundant number, since it is smaller than the sum of its proper divisors (6985057560).

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

3131230440 is a wasteful number, since it uses less digits than its factorization.

3131230440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2007226 (or 2007222 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 3131230440 is about 55957.3984384549. The cubic root of 3131230440 is about 1462.9798463438.

Adding to 3131230440 its reverse (440321313), we get a palindrome (3571551753).

The spelling of 3131230440 in words is "three billion, one hundred thirty-one million, two hundred thirty thousand, four hundred forty".