31275113 has 8 divisors (see below), whose sum is σ = 31614408. Its totient is φ = 30937984.

The previous prime is 31275103. The next prime is 31275119. The reversal of 31275113 is 31157213.

It can be written as a sum of positive squares in 4 ways, for example, as 10004569 + 21270544 = 3163^2 + 4612^2 .

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 31275113 - 2⁸ = 31274857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31275119) 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, 50381 + ... + 50997.

It is an arithmetic number, because the mean of its divisors is an integer number (3951801).

Almost surely, 2^31275113 is an apocalyptic number.

It is an amenable number.

31275113 is a deficient number, since it is larger than the sum of its proper divisors (339295).

31275113 is a wasteful number, since it uses less digits than its factorization.

31275113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1083.

The product of its digits is 630, while the sum is 23.

The square root of 31275113 is about 5592.4156676699. The cubic root of 31275113 is about 315.0646142751.

The spelling of 31275113 in words is "thirty-one million, two hundred seventy-five thousand, one hundred thirteen".