520322512251 has 16 divisors (see below), whose sum is σ = 734714678304. Its totient is φ = 326413883904.

The previous prime is 520322512243. The next prime is 520322512261. The reversal of 520322512251 is 152215223025.

It is not a de Polignac number, because 520322512251 - 2³ = 520322512243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (520322512261) 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 in 15 ways as a sum of consecutive naturals, for example, 716520 + ... + 1246613.

It is an arithmetic number, because the mean of its divisors is an integer number (45919667394).

Almost surely, 2^520322512251 is an apocalyptic number.

520322512251 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

520322512251 is a deficient number, since it is larger than the sum of its proper divisors (214392166053).

520322512251 is a wasteful number, since it uses less digits than its factorization.

520322512251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1968350.

The product of its (nonzero) digits is 12000, while the sum is 30.

Adding to 520322512251 its reverse (152215223025), we get a palindrome (672537735276).

The spelling of 520322512251 in words is "five hundred twenty billion, three hundred twenty-two million, five hundred twelve thousand, two hundred fifty-one".