57215011 has 8 divisors (see below), whose sum is σ = 66461024. Its totient is φ = 48237120.

The previous prime is 57215009. The next prime is 57215017. The reversal of 57215011 is 11051275.

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 57215011 - 2¹ = 57215009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (57215017) 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, 66570 + ... + 67423.

It is an arithmetic number, because the mean of its divisors is an integer number (8307628).

Almost surely, 2^57215011 is an apocalyptic number.

57215011 is a deficient number, since it is larger than the sum of its proper divisors (9246013).

57215011 is a wasteful number, since it uses less digits than its factorization.

57215011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134061.

The product of its (nonzero) digits is 350, while the sum is 22.

The square root of 57215011 is about 7564.0604836291. The cubic root of 57215011 is about 385.3334065850. Note that the first 3 decimals are identical.

Adding to 57215011 its reverse (11051275), we get a palindrome (68266286).

The spelling of 57215011 in words is "fifty-seven million, two hundred fifteen thousand, eleven".