57155851 has 4 divisors (see below), whose sum is σ = 59640912. Its totient is φ = 54670792.

The previous prime is 57155849. The next prime is 57155863. The reversal of 57155851 is 15855175.

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 57155851 - 2¹ = 57155849 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 57155851.

It is not an unprimeable number, because it can be changed into a prime (57155821) 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, 1242496 + ... + 1242541.

It is an arithmetic number, because the mean of its divisors is an integer number (14910228).

Almost surely, 2^57155851 is an apocalyptic number.

57155851 is a deficient number, since it is larger than the sum of its proper divisors (2485061).

57155851 is a wasteful number, since it uses less digits than its factorization.

57155851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2485060.

The product of its digits is 35000, while the sum is 37.

The square root of 57155851 is about 7560.1488741955. The cubic root of 57155851 is about 385.2005499241.

The spelling of 57155851 in words is "fifty-seven million, one hundred fifty-five thousand, eight hundred fifty-one".