31969705481 has 6 divisors (see below), whose sum is σ = 37189249290. Its totient is φ = 27402604656.

The previous prime is 31969705477. The next prime is 31969705511. The reversal of 31969705481 is 18450796913.

It can be written as a sum of positive squares in only one way, i.e., 23415120400 + 8554585081 = 153020^2 + 92491^2 .

It is not a de Polignac number, because 31969705481 - 2² = 31969705477 is a prime.

It is a super-2 number, since 2×31969705481² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31969705081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 326221436 + ... + 326221533.

It is an arithmetic number, because the mean of its divisors is an integer number (6198208215).

Almost surely, 2^31969705481 is an apocalyptic number.

It is an amenable number.

31969705481 is a deficient number, since it is larger than the sum of its proper divisors (5219543809).

31969705481 is an equidigital number, since it uses as much as digits as its factorization.

31969705481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652442983 (or 652442976 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 53.

The spelling of 31969705481 in words is "thirty-one billion, nine hundred sixty-nine million, seven hundred five thousand, four hundred eighty-one".