56891257 has 2 divisors, whose sum is σ = 56891258. Its totient is φ = 56891256.

The previous prime is 56891251. The next prime is 56891267. The reversal of 56891257 is 75219865.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32080896 + 24810361 = 5664^2 + 4981^2 .

It is a cyclic number.

It is not a de Polignac number, because 56891257 - 2³ = 56891249 is a prime.

It is not a weakly prime, because it can be changed into another prime (56891251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28445628 + 28445629.

It is an arithmetic number, because the mean of its divisors is an integer number (28445629).

Almost surely, 2^56891257 is an apocalyptic number.

It is an amenable number.

56891257 is a deficient number, since it is larger than the sum of its proper divisors (1).

56891257 is an equidigital number, since it uses as much as digits as its factorization.

56891257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 151200, while the sum is 43.

The square root of 56891257 is about 7542.6293160940. The cubic root of 56891257 is about 384.6052219151.

The spelling of 56891257 in words is "fifty-six million, eight hundred ninety-one thousand, two hundred fifty-seven".