56166013 has 2 divisors, whose sum is σ = 56166014. Its totient is φ = 56166012.

The previous prime is 56166001. The next prime is 56166043. The reversal of 56166013 is 31066165.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33489369 + 22676644 = 5787^2 + 4762^2 .

It is a cyclic number.

It is not a de Polignac number, because 56166013 - 2¹³ = 56157821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56166043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28083006 + 28083007.

It is an arithmetic number, because the mean of its divisors is an integer number (28083007).

Almost surely, 2^56166013 is an apocalyptic number.

It is an amenable number.

56166013 is a deficient number, since it is larger than the sum of its proper divisors (1).

56166013 is an equidigital number, since it uses as much as digits as its factorization.

56166013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 56166013 is about 7494.3987750853. The cubic root of 56166013 is about 382.9639248222.

The spelling of 56166013 in words is "fifty-six million, one hundred sixty-six thousand, thirteen".