57172061 has 2 divisors, whose sum is σ = 57172062. Its totient is φ = 57172060.

The previous prime is 57172033. The next prime is 57172099. The reversal of 57172061 is 16027175.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30184036 + 26988025 = 5494^2 + 5195^2 .

It is a cyclic number.

It is not a de Polignac number, because 57172061 - 2¹⁸ = 56909917 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57172261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28586030 + 28586031.

It is an arithmetic number, because the mean of its divisors is an integer number (28586031).

Almost surely, 2^57172061 is an apocalyptic number.

It is an amenable number.

57172061 is a deficient number, since it is larger than the sum of its proper divisors (1).

57172061 is an equidigital number, since it uses as much as digits as its factorization.

57172061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2940, while the sum is 29.

The square root of 57172061 is about 7561.2208670293. The cubic root of 57172061 is about 385.2369621234.

The spelling of 57172061 in words is "fifty-seven million, one hundred seventy-two thousand, sixty-one".