56130509 has 2 divisors, whose sum is σ = 56130510. Its totient is φ = 56130508.

The previous prime is 56130479. The next prime is 56130533. The reversal of 56130509 is 90503165.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40998409 + 15132100 = 6403^2 + 3890^2 .

It is a cyclic number.

It is not a de Polignac number, because 56130509 - 2¹⁶ = 56064973 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56130539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28065254 + 28065255.

It is an arithmetic number, because the mean of its divisors is an integer number (28065255).

Almost surely, 2^56130509 is an apocalyptic number.

It is an amenable number.

56130509 is a deficient number, since it is larger than the sum of its proper divisors (1).

56130509 is an equidigital number, since it uses as much as digits as its factorization.

56130509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4050, while the sum is 29.

The square root of 56130509 is about 7492.0296982860. The cubic root of 56130509 is about 382.8832139888.

The spelling of 56130509 in words is "fifty-six million, one hundred thirty thousand, five hundred nine".