31130244431 has 8 divisors (see below), whose sum is σ = 36572595024. Its totient is φ = 26123281920.

The previous prime is 31130244407. The next prime is 31130244479. The reversal of 31130244431 is 13444203113.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31130244431 - 2¹⁴ = 31130228047 is a prime.

It is a super-2 number, since 2×31130244431² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31130244431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31130244031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108846866 + ... + 108847151.

It is an arithmetic number, because the mean of its divisors is an integer number (4571574378).

Almost surely, 2^31130244431 is an apocalyptic number.

31130244431 is a deficient number, since it is larger than the sum of its proper divisors (5442350593).

31130244431 is a wasteful number, since it uses less digits than its factorization.

31130244431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217694041.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 31130244431 its reverse (13444203113), we get a palindrome (44574447544).

The spelling of 31130244431 in words is "thirty-one billion, one hundred thirty million, two hundred forty-four thousand, four hundred thirty-one".