31634681 has 8 divisors (see below), whose sum is σ = 34500480. Its totient is φ = 28830672.

The previous prime is 31634641. The next prime is 31634717. The reversal of 31634681 is 18643613.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31634681 - 2¹⁴ = 31618297 is a prime.

It is a super-2 number, since 2×31634681² = 2001506083943522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31634611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14375 + ... + 16428.

It is an arithmetic number, because the mean of its divisors is an integer number (4312560).

Almost surely, 2^31634681 is an apocalyptic number.

It is an amenable number.

31634681 is a deficient number, since it is larger than the sum of its proper divisors (2865799).

31634681 is a wasteful number, since it uses less digits than its factorization.

31634681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30895.

The product of its digits is 10368, while the sum is 32.

The square root of 31634681 is about 5624.4716196279. The cubic root of 31634681 is about 316.2674423663.

The spelling of 31634681 in words is "thirty-one million, six hundred thirty-four thousand, six hundred eighty-one".