57201891 has 8 divisors (see below), whose sum is σ = 78899280. Its totient is φ = 36819552.

The previous prime is 57201887. The next prime is 57201899. The reversal of 57201891 is 19810275.

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

It is not a de Polignac number, because 57201891 - 2² = 57201887 is a prime.

It is not an unprimeable number, because it can be changed into a prime (57201899) 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, 328660 + ... + 328833.

It is an arithmetic number, because the mean of its divisors is an integer number (9862410).

Almost surely, 2^57201891 is an apocalyptic number.

57201891 is a deficient number, since it is larger than the sum of its proper divisors (21697389).

57201891 is a wasteful number, since it uses less digits than its factorization.

57201891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657525.

The product of its (nonzero) digits is 5040, while the sum is 33.

The square root of 57201891 is about 7563.1931748435. The cubic root of 57201891 is about 385.3039506743.

The spelling of 57201891 in words is "fifty-seven million, two hundred one thousand, eight hundred ninety-one".