56305181 has 2 divisors, whose sum is σ = 56305182. Its totient is φ = 56305180.

The previous prime is 56305169. The next prime is 56305187. The reversal of 56305181 is 18150365.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43099225 + 13205956 = 6565^2 + 3634^2 .

It is a cyclic number.

It is not a de Polignac number, because 56305181 - 2¹⁸ = 56043037 is a prime.

It is a super-2 number, since 2×56305181² = 6340546814885522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56305187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28152590 + 28152591.

It is an arithmetic number, because the mean of its divisors is an integer number (28152591).

Almost surely, 2^56305181 is an apocalyptic number.

It is an amenable number.

56305181 is a deficient number, since it is larger than the sum of its proper divisors (1).

56305181 is an equidigital number, since it uses as much as digits as its factorization.

56305181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 56305181 is about 7503.6778315703. The cubic root of 56305181 is about 383.2799662737.

The spelling of 56305181 in words is "fifty-six million, three hundred five thousand, one hundred eighty-one".