522015997 has 2 divisors, whose sum is σ = 522015998. Its totient is φ = 522015996.

The previous prime is 522015959. The next prime is 522016007. The reversal of 522015997 is 799510225.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 516698361 + 5317636 = 22731^2 + 2306^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-522015997 is a prime.

It is a super-2 number, since 2×522015997² = 545001402247808018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (522015097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 261007998 + 261007999.

It is an arithmetic number, because the mean of its divisors is an integer number (261007999).

Almost surely, 2^522015997 is an apocalyptic number.

It is an amenable number.

522015997 is a deficient number, since it is larger than the sum of its proper divisors (1).

522015997 is an equidigital number, since it uses as much as digits as its factorization.

522015997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56700, while the sum is 40.

The square root of 522015997 is about 22847.6693997440. The cubic root of 522015997 is about 805.1830130558.

The spelling of 522015997 in words is "five hundred twenty-two million, fifteen thousand, nine hundred ninety-seven".