56757213 has 16 divisors (see below), whose sum is σ = 84245760. Its totient is φ = 37765728.

The previous prime is 56757209. The next prime is 56757257. The reversal of 56757213 is 31275765.

It is not a de Polignac number, because 56757213 - 2² = 56757209 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56757413) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14956 + ... + 18362.

It is an arithmetic number, because the mean of its divisors is an integer number (5265360).

Almost surely, 2^56757213 is an apocalyptic number.

It is an amenable number.

56757213 is a deficient number, since it is larger than the sum of its proper divisors (27488547).

56757213 is a wasteful number, since it uses less digits than its factorization.

56757213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4033 (or 4027 counting only the distinct ones).

The product of its digits is 44100, while the sum is 36.

The square root of 56757213 is about 7533.7383150731. The cubic root of 56757213 is about 384.3029225945.

The spelling of 56757213 in words is "fifty-six million, seven hundred fifty-seven thousand, two hundred thirteen".