520522251 has 4 divisors (see below), whose sum is σ = 694029672. Its totient is φ = 347014832.

The previous prime is 520522241. The next prime is 520522259. The reversal of 520522251 is 152225025.

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

It is a cyclic number.

It is not a de Polignac number, because 520522251 - 2⁶ = 520522187 is a prime.

It is a super-2 number, since 2×520522251² = 541886827572214002, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (520522259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86753706 + ... + 86753711.

It is an arithmetic number, because the mean of its divisors is an integer number (173507418).

Almost surely, 2^520522251 is an apocalyptic number.

520522251 is a deficient number, since it is larger than the sum of its proper divisors (173507421).

520522251 is a wasteful number, since it uses less digits than its factorization.

520522251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173507420.

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 520522251 is about 22814.9567389465. The cubic root of 520522251 is about 804.4142703675.

Adding to 520522251 its reverse (152225025), we get a palindrome (672747276).

The spelling of 520522251 in words is "five hundred twenty million, five hundred twenty-two thousand, two hundred fifty-one".