31064881 has 4 divisors (see below), whose sum is σ = 32415552. Its totient is φ = 29714212.

The previous prime is 31064863. The next prime is 31064909. The reversal of 31064881 is 18846013.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31064881 - 2¹³ = 31056689 is a prime.

It is a super-2 number, since 2×31064881² = 1930053663088322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31064281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 675301 + ... + 675346.

It is an arithmetic number, because the mean of its divisors is an integer number (8103888).

Almost surely, 2^31064881 is an apocalyptic number.

It is an amenable number.

31064881 is a deficient number, since it is larger than the sum of its proper divisors (1350671).

31064881 is a wasteful number, since it uses less digits than its factorization.

31064881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1350670.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 31064881 is about 5573.5878032018. The cubic root of 31064881 is about 314.3570694241.

The spelling of 31064881 in words is "thirty-one million, sixty-four thousand, eight hundred eighty-one".