57017561 has 2 divisors, whose sum is σ = 57017562. Its totient is φ = 57017560.

The previous prime is 57017557. The next prime is 57017647. The reversal of 57017561 is 16571075.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56911936 + 105625 = 7544^2 + 325^2 .

It is a cyclic number.

It is not a de Polignac number, because 57017561 - 2² = 57017557 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (57014561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28508780 + 28508781.

It is an arithmetic number, because the mean of its divisors is an integer number (28508781).

Almost surely, 2^57017561 is an apocalyptic number.

It is an amenable number.

57017561 is a deficient number, since it is larger than the sum of its proper divisors (1).

57017561 is an equidigital number, since it uses as much as digits as its factorization.

57017561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7350, while the sum is 32.

The square root of 57017561 is about 7550.9973513437. The cubic root of 57017561 is about 384.8896316008.

The spelling of 57017561 in words is "fifty-seven million, seventeen thousand, five hundred sixty-one".