56170561 has 2 divisors, whose sum is σ = 56170562. Its totient is φ = 56170560.

The previous prime is 56170559. The next prime is 56170571. The reversal of 56170561 is 16507165.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51840000 + 4330561 = 7200^2 + 2081^2 .

It is a cyclic number.

It is not a de Polignac number, because 56170561 - 2¹ = 56170559 is a prime.

Together with 56170559, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (56170571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28085280 + 28085281.

It is an arithmetic number, because the mean of its divisors is an integer number (28085281).

Almost surely, 2^56170561 is an apocalyptic number.

It is an amenable number.

56170561 is a deficient number, since it is larger than the sum of its proper divisors (1).

56170561 is an equidigital number, since it uses as much as digits as its factorization.

56170561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6300, while the sum is 31.

The square root of 56170561 is about 7494.7021955512. The cubic root of 56170561 is about 382.9742612803.

The spelling of 56170561 in words is "fifty-six million, one hundred seventy thousand, five hundred sixty-one".