520075631 has 2 divisors, whose sum is σ = 520075632. Its totient is φ = 520075630.

The previous prime is 520075613. The next prime is 520075667. The reversal of 520075631 is 136570025.

Together with previous prime (520075613) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-520075631 is a prime.

It is a super-2 number, since 2×520075631² = 540957323920096322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 520075594 and 520075603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (520075601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260037815 + 260037816.

It is an arithmetic number, because the mean of its divisors is an integer number (260037816).

Almost surely, 2^520075631 is an apocalyptic number.

520075631 is a deficient number, since it is larger than the sum of its proper divisors (1).

520075631 is an equidigital number, since it uses as much as digits as its factorization.

520075631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6300, while the sum is 29.

The square root of 520075631 is about 22805.1667610654. The cubic root of 520075631 is about 804.1841359189.

The spelling of 520075631 in words is "five hundred twenty million, seventy-five thousand, six hundred thirty-one".