31212412430 has 48 divisors (see below), whose sum is σ = 58941615600. Its totient is φ = 11899371264.

The previous prime is 31212412421. The next prime is 31212412433. The reversal of 31212412430 is 3421421213.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a junction number, because it is equal to n+sod(n) for n = 31212412396 and 31212412405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31212412433) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1486646 + ... + 1507494.

It is an arithmetic number, because the mean of its divisors is an integer number (1227950325).

Almost surely, 2^31212412430 is an apocalyptic number.

31212412430 is a deficient number, since it is larger than the sum of its proper divisors (27729203170).

31212412430 is a wasteful number, since it uses less digits than its factorization.

31212412430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21185 (or 21162 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 31212412430 its reverse (3421421213), we get a palindrome (34633833643).

The spelling of 31212412430 in words is "thirty-one billion, two hundred twelve million, four hundred twelve thousand, four hundred thirty".