56515189 has 2 divisors, whose sum is σ = 56515190. Its totient is φ = 56515188.

The previous prime is 56515183. The next prime is 56515241. The reversal of 56515189 is 98151565.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45900625 + 10614564 = 6775^2 + 3258^2 .

It is a cyclic number.

It is not a de Polignac number, because 56515189 - 2⁷ = 56515061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56515183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28257594 + 28257595.

It is an arithmetic number, because the mean of its divisors is an integer number (28257595).

Almost surely, 2^56515189 is an apocalyptic number.

It is an amenable number.

56515189 is a deficient number, since it is larger than the sum of its proper divisors (1).

56515189 is an equidigital number, since it uses as much as digits as its factorization.

56515189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54000, while the sum is 40.

The square root of 56515189 is about 7517.6584785424. The cubic root of 56515189 is about 383.7558963822.

The spelling of 56515189 in words is "fifty-six million, five hundred fifteen thousand, one hundred eighty-nine".