57055191 has 16 divisors (see below), whose sum is σ = 77911680. Its totient is φ = 37127520.

The previous prime is 57055177. The next prime is 57055211. The reversal of 57055191 is 19155075.

It is not a de Polignac number, because 57055191 - 2¹³ = 57046999 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57055171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24316 + ... + 26558.

It is an arithmetic number, because the mean of its divisors is an integer number (4869480).

Almost surely, 2^57055191 is an apocalyptic number.

57055191 is a deficient number, since it is larger than the sum of its proper divisors (20856489).

57055191 is a wasteful number, since it uses less digits than its factorization.

57055191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2446.

The product of its (nonzero) digits is 7875, while the sum is 33.

The square root of 57055191 is about 7553.4886641869. The cubic root of 57055191 is about 384.9742851212.

The spelling of 57055191 in words is "fifty-seven million, fifty-five thousand, one hundred ninety-one".