521151131052 has 72 divisors (see below), whose sum is σ = 1320109657776. Its totient is φ = 173354024064.

The previous prime is 521151131041. The next prime is 521151131071. The reversal of 521151131052 is 250131151125.

It is a happy number.

521151131052 is a `hidden beast` number, since 521 + 1 + 5 + 1 + 131 + 0 + 5 + 2 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46471798 + ... + 46483010.

It is an arithmetic number, because the mean of its divisors is an integer number (18334856358).

Almost surely, 2^521151131052 is an apocalyptic number.

It is an amenable number.

521151131052 is an abundant number, since it is smaller than the sum of its proper divisors (798958526724).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

521151131052 is a wasteful number, since it uses less digits than its factorization.

521151131052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13807 (or 13802 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 27.

Adding to 521151131052 its reverse (250131151125), we get a palindrome (771282282177).

The spelling of 521151131052 in words is "five hundred twenty-one billion, one hundred fifty-one million, one hundred thirty-one thousand, fifty-two".