56461813 has 2 divisors, whose sum is σ = 56461814. Its totient is φ = 56461812.

The previous prime is 56461799. The next prime is 56461831. The reversal of 56461813 is 31816465.

It is a happy number.

Together with next prime (56461831) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55457809 + 1004004 = 7447^2 + 1002^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56461813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56461883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28230906 + 28230907.

It is an arithmetic number, because the mean of its divisors is an integer number (28230907).

Almost surely, 2^56461813 is an apocalyptic number.

It is an amenable number.

56461813 is a deficient number, since it is larger than the sum of its proper divisors (1).

56461813 is an equidigital number, since it uses as much as digits as its factorization.

56461813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 34.

The square root of 56461813 is about 7514.1075983779. The cubic root of 56461813 is about 383.6350450559.

The spelling of 56461813 in words is "fifty-six million, four hundred sixty-one thousand, eight hundred thirteen".