31601057 has 4 divisors (see below), whose sum is σ = 32975040. Its totient is φ = 30227076.

The previous prime is 31601051. The next prime is 31601077. The reversal of 31601057 is 75010613.

31601057 is nontrivially palindromic in base 7.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31601057 - 2⁴ = 31601041 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 1373959 = 31601057 / (3 + 1 + 6 + 0 + 1 + 0 + 5 + 7).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31601051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 686957 + ... + 687002.

It is an arithmetic number, because the mean of its divisors is an integer number (8243760).

Almost surely, 2^31601057 is an apocalyptic number.

It is an amenable number.

31601057 is a deficient number, since it is larger than the sum of its proper divisors (1373983).

31601057 is a wasteful number, since it uses less digits than its factorization.

31601057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1373982.

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

The square root of 31601057 is about 5621.4817441667. The cubic root of 31601057 is about 316.1553507629.

The spelling of 31601057 in words is "thirty-one million, six hundred one thousand, fifty-seven".