31261542122439 has 6 divisors (see below), whose sum is σ = 45155560843536. Its totient is φ = 20841028081620.

The previous prime is 31261542122423. The next prime is 31261542122467. The reversal of 31261542122439 is 93422124516213.

31261542122439 is a `hidden beast` number, since 3 + 1 + 2 + 61 + 542 + 1 + 2 + 2 + 43 + 9 = 666.

It is not a de Polignac number, because 31261542122439 - 2⁴ = 31261542122423 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31261542122394 and 31261542122403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31261542123439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1736752340127 + ... + 1736752340144.

It is an arithmetic number, because the mean of its divisors is an integer number (7525926807256).

Almost surely, 2^{31261542122439} is an apocalyptic number.

31261542122439 is a deficient number, since it is larger than the sum of its proper divisors (13894018721097).

31261542122439 is a wasteful number, since it uses less digits than its factorization.

31261542122439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3473504680277 (or 3473504680274 counting only the distinct ones).

The product of its digits is 622080, while the sum is 45.

The spelling of 31261542122439 in words is "thirty-one trillion, two hundred sixty-one billion, five hundred forty-two million, one hundred twenty-two thousand, four hundred thirty-nine".