57215066 has 8 divisors (see below), whose sum is σ = 87031584. Its totient is φ = 28204540.

The previous prime is 57215033. The next prime is 57215071. The reversal of 57215066 is 66051275.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

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, 201320 + ... + 201603.

It is an arithmetic number, because the mean of its divisors is an integer number (10878948).

Almost surely, 2^57215066 is an apocalyptic number.

57215066 is a deficient number, since it is larger than the sum of its proper divisors (29816518).

57215066 is a wasteful number, since it uses less digits than its factorization.

57215066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402996.

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 57215066 is about 7564.0641192417. The cubic root of 57215066 is about 385.3335300569. Note that the first 3 decimals are identical.

The spelling of 57215066 in words is "fifty-seven million, two hundred fifteen thousand, sixty-six".