520368157 has 2 divisors, whose sum is σ = 520368158. Its totient is φ = 520368156.

The previous prime is 520368119. The next prime is 520368193. The reversal of 520368157 is 751863025.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 419184676 + 101183481 = 20474^2 + 10059^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-520368157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (520366157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260184078 + 260184079.

It is an arithmetic number, because the mean of its divisors is an integer number (260184079).

Almost surely, 2^520368157 is an apocalyptic number.

It is an amenable number.

520368157 is a deficient number, since it is larger than the sum of its proper divisors (1).

520368157 is an equidigital number, since it uses as much as digits as its factorization.

520368157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 50400, while the sum is 37.

The square root of 520368157 is about 22811.5794499197. The cubic root of 520368157 is about 804.3348836579.

The spelling of 520368157 in words is "five hundred twenty million, three hundred sixty-eight thousand, one hundred fifty-seven".