31031131230 has 72 divisors (see below), whose sum is σ = 88682387976. Its totient is φ = 7522695840.

The previous prime is 31031131217. The next prime is 31031131231. The reversal of 31031131230 is 3213113013.

It is a happy number.

31031131230 is a `hidden beast` number, since 3 + 10 + 311 + 312 + 30 = 666.

It is a super-2 number, since 2×31031131230² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31031131231) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1413864 + ... + 1435643.

It is an arithmetic number, because the mean of its divisors is an integer number (1231699833).

Almost surely, 2^31031131230 is an apocalyptic number.

31031131230 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31031131230 is an abundant number, since it is smaller than the sum of its proper divisors (57651256746).

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

31031131230 is a wasteful number, since it uses less digits than its factorization.

31031131230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2849542 (or 2849528 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

Adding to 31031131230 its reverse (3213113013), we get a palindrome (34244244243).

It can be divided in two parts, 31031 and 131230, that added together give a palindrome (162261).

The spelling of 31031131230 in words is "thirty-one billion, thirty-one million, one hundred thirty-one thousand, two hundred thirty".