57161251 has 16 divisors (see below), whose sum is σ = 66685696. Its totient is φ = 47985696.

The previous prime is 57161249. The next prime is 57161281. The reversal of 57161251 is 15216175.

It is a cyclic number.

It is not a de Polignac number, because 57161251 - 2¹ = 57161249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (57161231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143785 + ... + 144181.

It is an arithmetic number, because the mean of its divisors is an integer number (4167856).

Almost surely, 2^57161251 is an apocalyptic number.

57161251 is a deficient number, since it is larger than the sum of its proper divisors (9524445).

57161251 is a wasteful number, since it uses less digits than its factorization.

57161251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778.

The product of its digits is 2100, while the sum is 28.

The square root of 57161251 is about 7560.5060015848. The cubic root of 57161251 is about 385.2126806009.

The spelling of 57161251 in words is "fifty-seven million, one hundred sixty-one thousand, two hundred fifty-one".