57051591 has 4 divisors (see below), whose sum is σ = 76068792. Its totient is φ = 38034392.

The previous prime is 57051587. The next prime is 57051601. The reversal of 57051591 is 19515075.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 57051591 - 2² = 57051587 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57051551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9508596 + ... + 9508601.

It is an arithmetic number, because the mean of its divisors is an integer number (19017198).

Almost surely, 2^57051591 is an apocalyptic number.

57051591 is a deficient number, since it is larger than the sum of its proper divisors (19017201).

57051591 is a wasteful number, since it uses less digits than its factorization.

57051591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19017200.

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

The square root of 57051591 is about 7553.2503599444. The cubic root of 57051591 is about 384.9661880690.

The spelling of 57051591 in words is "fifty-seven million, fifty-one thousand, five hundred ninety-one".