520623031157 has 4 divisors (see below), whose sum is σ = 520783078380. Its totient is φ = 520462983936.

The previous prime is 520623031141. The next prime is 520623031163. The reversal of 520623031157 is 751130326025.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 510347356996 + 10275674161 = 714386^2 + 101369^2 .

It is a cyclic number.

It is not a de Polignac number, because 520623031157 - 2⁴ = 520623031141 is a prime.

It is a super-2 number, since 2×520623031157² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520623031457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80018732 + ... + 80025237.

It is an arithmetic number, because the mean of its divisors is an integer number (130195769595).

Almost surely, 2^520623031157 is an apocalyptic number.

It is an amenable number.

520623031157 is a deficient number, since it is larger than the sum of its proper divisors (160047223).

520623031157 is a wasteful number, since it uses less digits than its factorization.

520623031157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160047222.

The product of its (nonzero) digits is 37800, while the sum is 35.

The spelling of 520623031157 in words is "five hundred twenty billion, six hundred twenty-three million, thirty-one thousand, one hundred fifty-seven".