31220024000431 has 32 divisors (see below), whose sum is σ = 38356743168000. Its totient is φ = 24835989709440.

The previous prime is 31220024000351. The next prime is 31220024000441. The reversal of 31220024000431 is 13400042002213.

It is not a de Polignac number, because 31220024000431 - 2⁷ = 31220024000303 is a prime.

It is a super-2 number, since 2×31220024000431² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31220024000441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15710235 + ... + 17585548.

It is an arithmetic number, because the mean of its divisors is an integer number (1198648224000).

Almost surely, 2^{31220024000431} is an apocalyptic number.

31220024000431 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

31220024000431 is a deficient number, since it is larger than the sum of its proper divisors (7136719167569).

31220024000431 is a wasteful number, since it uses less digits than its factorization.

31220024000431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33295999.

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

Adding to 31220024000431 its reverse (13400042002213), we get a palindrome (44620066002644).

The spelling of 31220024000431 in words is "thirty-one trillion, two hundred twenty billion, twenty-four million, four hundred thirty-one", and thus it is an aban number.