56919157 has 2 divisors, whose sum is σ = 56919158. Its totient is φ = 56919156.

The previous prime is 56919133. The next prime is 56919167. The reversal of 56919157 is 75191965.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56340036 + 579121 = 7506^2 + 761^2 .

It is a cyclic number.

It is not a de Polignac number, because 56919157 - 2¹¹ = 56917109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56919127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28459578 + 28459579.

It is an arithmetic number, because the mean of its divisors is an integer number (28459579).

Almost surely, 2^56919157 is an apocalyptic number.

It is an amenable number.

56919157 is a deficient number, since it is larger than the sum of its proper divisors (1).

56919157 is an equidigital number, since it uses as much as digits as its factorization.

56919157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 85050, while the sum is 43.

The square root of 56919157 is about 7544.4785770787. The cubic root of 56919157 is about 384.6680829628.

The spelling of 56919157 in words is "fifty-six million, nine hundred nineteen thousand, one hundred fifty-seven".