31224130402 has 16 divisors (see below), whose sum is σ = 46927188000. Its totient is φ = 15581755840.

The previous prime is 31224130397. The next prime is 31224130411. The reversal of 31224130402 is 20403142213.

It is a super-2 number, since 2×31224130402² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4953849 + ... + 4960147.

It is an arithmetic number, because the mean of its divisors is an integer number (2932949250).

Almost surely, 2^31224130402 is an apocalyptic number.

31224130402 is a deficient number, since it is larger than the sum of its proper divisors (15703057598).

31224130402 is a wasteful number, since it uses less digits than its factorization.

31224130402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10721.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 31224130402 its reverse (20403142213), we get a palindrome (51627272615).

The spelling of 31224130402 in words is "thirty-one billion, two hundred twenty-four million, one hundred thirty thousand, four hundred two".