31379285 has 16 divisors (see below), whose sum is σ = 44424192. Its totient is φ = 20822400.

The previous prime is 31379273. The next prime is 31379303. The reversal of 31379285 is 58297313.

It is not a de Polignac number, because 31379285 - 2¹² = 31375189 is a prime.

It is a super-2 number, since 2×31379285² = 1969319054222450, which contains 22 as substring.

It is a Smith number, since the sum of its digits (38) 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 a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13376 + ... + 15545.

It is an arithmetic number, because the mean of its divisors is an integer number (2776512).

Almost surely, 2^31379285 is an apocalyptic number.

31379285 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

31379285 is a deficient number, since it is larger than the sum of its proper divisors (13044907).

31379285 is a wasteful number, since it uses less digits than its factorization.

31379285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28964.

The product of its digits is 45360, while the sum is 38.

The square root of 31379285 is about 5601.7216103623. The cubic root of 31379285 is about 315.4140352137.

The spelling of 31379285 in words is "thirty-one million, three hundred seventy-nine thousand, two hundred eighty-five".