31294874065 has 128 divisors (see below), whose sum is σ = 52238269440. Its totient is φ = 17414258688.

The previous prime is 31294874063. The next prime is 31294874069. The reversal of 31294874065 is 56047849213.

It is a happy number.

It is a 12-Lehmer number, since φ(31294874065) divides (31294874065-1)¹².

It is a cyclic number.

It is not a de Polignac number, because 31294874065 - 2¹ = 31294874063 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31294874063) by changing a digit.

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 127 ways as a sum of consecutive naturals, for example, 10726987 + ... + 10729903.

It is an arithmetic number, because the mean of its divisors is an integer number (408111480).

It is a 2-persistent number, because it is pandigital, and so is 2⋅31294874065 = 62589748130, but 3⋅31294874065 = 93884622195 is not.

Almost surely, 2^31294874065 is an apocalyptic number.

31294874065 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

31294874065 is a deficient number, since it is larger than the sum of its proper divisors (20943395375).

31294874065 is a wasteful number, since it uses less digits than its factorization.

31294874065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3051.

The product of its (nonzero) digits is 1451520, while the sum is 49.

The spelling of 31294874065 in words is "thirty-one billion, two hundred ninety-four million, eight hundred seventy-four thousand, sixty-five".