3131864 has 16 divisors (see below), whose sum is σ = 6127920. Its totient is φ = 1497760.

The previous prime is 3131861. The next prime is 3131879. The reversal of 3131864 is 4681313.

It is a super-2 number, since 2×3131864² = 19617144228992, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3131861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8327 + ... + 8694.

It is an arithmetic number, because the mean of its divisors is an integer number (382995).

Almost surely, 2^3131864 is an apocalyptic number.

It is an amenable number.

3131864 is a deficient number, since it is larger than the sum of its proper divisors (2996056).

3131864 is a wasteful number, since it uses less digits than its factorization.

3131864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17050 (or 17046 counting only the distinct ones).

The product of its digits is 1728, while the sum is 26.

The square root of 3131864 is about 1769.7073204347. The cubic root of 3131864 is about 146.3078510753.

The spelling of 3131864 in words is "three million, one hundred thirty-one thousand, eight hundred sixty-four".