31285666401 has 16 divisors (see below), whose sum is σ = 45525991680. Its totient is φ = 18952856720.

The previous prime is 31285666393. The next prime is 31285666417. The reversal of 31285666401 is 10466658213.

It is a cyclic number.

It is not a de Polignac number, because 31285666401 - 2³ = 31285666393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31285666471) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 125475 + ... + 279848.

It is an arithmetic number, because the mean of its divisors is an integer number (2845374480).

Almost surely, 2^31285666401 is an apocalyptic number.

It is an amenable number.

31285666401 is a deficient number, since it is larger than the sum of its proper divisors (14240325279).

31285666401 is a wasteful number, since it uses less digits than its factorization.

31285666401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407676.

The product of its (nonzero) digits is 207360, while the sum is 42.

The spelling of 31285666401 in words is "thirty-one billion, two hundred eighty-five million, six hundred sixty-six thousand, four hundred one".