31310123424 has 48 divisors (see below), whose sum is σ = 84410409888. Its totient is φ = 10154633472.

The previous prime is 31310123401. The next prime is 31310123447. The reversal of 31310123424 is 42432101313.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (31310123401) and next prime (31310123447).

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×31310123424² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 31310123394 and 31310123403.

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, 4403842 + ... + 4410945.

It is an arithmetic number, because the mean of its divisors is an integer number (1758550206).

Almost surely, 2^31310123424 is an apocalyptic number.

It is an amenable number.

31310123424 is an abundant number, since it is smaller than the sum of its proper divisors (53100286464).

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

31310123424 is a wasteful number, since it uses less digits than its factorization.

31310123424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8814837 (or 8814829 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 31310123424 its reverse (42432101313), we get a palindrome (73742224737).

The spelling of 31310123424 in words is "thirty-one billion, three hundred ten million, one hundred twenty-three thousand, four hundred twenty-four".