56551897 has 2 divisors, whose sum is σ = 56551898. Its totient is φ = 56551896.

The previous prime is 56551889. The next prime is 56551903. The reversal of 56551897 is 79815565.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52475536 + 4076361 = 7244^2 + 2019^2 .

It is a cyclic number.

It is not a de Polignac number, because 56551897 - 2³ = 56551889 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (56555897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28275948 + 28275949.

It is an arithmetic number, because the mean of its divisors is an integer number (28275949).

Almost surely, 2^56551897 is an apocalyptic number.

It is an amenable number.

56551897 is a deficient number, since it is larger than the sum of its proper divisors (1).

56551897 is an equidigital number, since it uses as much as digits as its factorization.

56551897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 378000, while the sum is 46.

The square root of 56551897 is about 7520.0995339158. The cubic root of 56551897 is about 383.8389646857.

The spelling of 56551897 in words is "fifty-six million, five hundred fifty-one thousand, eight hundred ninety-seven".