31057393 has 8 divisors (see below), whose sum is σ = 32011200. Its totient is φ = 30109680.

The previous prime is 31057391. The next prime is 31057421. The reversal of 31057393 is 39375013.

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 31057393 - 2¹ = 31057391 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31057391) 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, 10158 + ... + 12856.

It is an arithmetic number, because the mean of its divisors is an integer number (4001400).

Almost surely, 2^31057393 is an apocalyptic number.

It is an amenable number.

31057393 is a deficient number, since it is larger than the sum of its proper divisors (953807).

31057393 is a wasteful number, since it uses less digits than its factorization.

31057393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3047.

The product of its (nonzero) digits is 8505, while the sum is 31.

The square root of 31057393 is about 5572.9160230529. The cubic root of 31057393 is about 314.3318094433.

The spelling of 31057393 in words is "thirty-one million, fifty-seven thousand, three hundred ninety-three".