31264681 has 8 divisors (see below), whose sum is σ = 35765120. Its totient is φ = 26772768.

The previous prime is 31264669. The next prime is 31264687. The reversal of 31264681 is 18646213.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 31264681 - 2⁷ = 31264553 is a prime.

It is a super-2 number, since 2×31264681² = 1954960556063522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31264687) 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, 11965 + ... + 14341.

It is an arithmetic number, because the mean of its divisors is an integer number (4470640).

Almost surely, 2^31264681 is an apocalyptic number.

It is an amenable number.

31264681 is a deficient number, since it is larger than the sum of its proper divisors (4500439).

31264681 is a wasteful number, since it uses less digits than its factorization.

31264681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4263.

The product of its digits is 6912, while the sum is 31.

The square root of 31264681 is about 5591.4828981228. The cubic root of 31264681 is about 315.0295798207.

The spelling of 31264681 in words is "thirty-one million, two hundred sixty-four thousand, six hundred eighty-one".