31248136 has 8 divisors (see below), whose sum is σ = 58590270. Its totient is φ = 15624064.

The previous prime is 31248127. The next prime is 31248149. The reversal of 31248136 is 63184213.

It can be written as a sum of positive squares in only one way, i.e., 31248100 + 36 = 5590^2 + 6^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1953001 + ... + 1953016.

Almost surely, 2^31248136 is an apocalyptic number.

It is an amenable number.

31248136 is a deficient number, since it is larger than the sum of its proper divisors (27342134).

31248136 is a wasteful number, since it uses less digits than its factorization.

31248136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3906023 (or 3906019 counting only the distinct ones).

The product of its digits is 3456, while the sum is 28.

The square root of 31248136 is about 5590.0032200349. The cubic root of 31248136 is about 314.9739997016.

It can be divided in two parts, 312481 and 36, that multiplied together give a square (11249316 = 3354²).

The spelling of 31248136 in words is "thirty-one million, two hundred forty-eight thousand, one hundred thirty-six".