57220065 has 48 divisors (see below), whose sum is σ = 113887488. Its totient is φ = 26034048.

The previous prime is 57220049. The next prime is 57220081. The reversal of 57220065 is 56002275.

It is an interprime number because it is at equal distance from previous prime (57220049) and next prime (57220081).

It is not a de Polignac number, because 57220065 - 2⁴ = 57220049 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 117252 + ... + 117738.

It is an arithmetic number, because the mean of its divisors is an integer number (2372656).

Almost surely, 2^57220065 is an apocalyptic number.

It is an amenable number.

57220065 is a deficient number, since it is larger than the sum of its proper divisors (56667423).

57220065 is a wasteful number, since it uses less digits than its factorization.

57220065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 878 (or 875 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 57220065 is about 7564.3945560765. The cubic root of 57220065 is about 385.3447521956.

The spelling of 57220065 in words is "fifty-seven million, two hundred twenty thousand, sixty-five".