31261402117 has 16 divisors (see below), whose sum is σ = 34665180480. Its totient is φ = 27954259200.

The previous prime is 31261402087. The next prime is 31261402121. The reversal of 31261402117 is 71120416213.

It is a cyclic number.

It is not a de Polignac number, because 31261402117 - 2¹⁹ = 31260877829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31261402147) 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, 134317 + ... + 283837.

It is an arithmetic number, because the mean of its divisors is an integer number (2166573780).

Almost surely, 2^31261402117 is an apocalyptic number.

It is an amenable number.

31261402117 is a deficient number, since it is larger than the sum of its proper divisors (3403778363).

31261402117 is a wasteful number, since it uses less digits than its factorization.

31261402117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149844.

The product of its (nonzero) digits is 2016, while the sum is 28.

The spelling of 31261402117 in words is "thirty-one billion, two hundred sixty-one million, four hundred two thousand, one hundred seventeen".