31223613465 has 192 divisors, whose sum is σ = 64611406080. Its totient is φ = 13823170560.

The previous prime is 31223613401. The next prime is 31223613467. The reversal of 31223613465 is 56431632213.

31223613465 is a `hidden beast` number, since 3 + 12 + 23 + 613 + 4 + 6 + 5 = 666.

It is not a de Polignac number, because 31223613465 - 2⁶ = 31223613401 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31223613467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 89981422 + ... + 89981768.

It is an arithmetic number, because the mean of its divisors is an integer number (336517740).

Almost surely, 2^31223613465 is an apocalyptic number.

It is an amenable number.

31223613465 is an abundant number, since it is smaller than the sum of its proper divisors (33387792615).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31223613465 is a wasteful number, since it uses less digits than its factorization.

31223613465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457 (or 420 counting only the distinct ones).

The product of its digits is 77760, while the sum is 36.

The spelling of 31223613465 in words is "thirty-one billion, two hundred twenty-three million, six hundred thirteen thousand, four hundred sixty-five".