521200422052 has 18 divisors (see below), whose sum is σ = 968909783282. Its totient is φ = 245270786304.

The previous prime is 521200421981. The next prime is 521200422109. The reversal of 521200422052 is 250224002125.

It can be written as a sum of positive squares in 3 ways, for example, as 123324582976 + 397875839076 = 351176^2 + 630774^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 225431553 + ... + 225433864.

Almost surely, 2^521200422052 is an apocalyptic number.

It is an amenable number.

521200422052 is a deficient number, since it is larger than the sum of its proper divisors (447709361230).

521200422052 is a wasteful number, since it uses less digits than its factorization.

521200422052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450865455 (or 450865436 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

Adding to 521200422052 its reverse (250224002125), we get a palindrome (771424424177).

The spelling of 521200422052 in words is "five hundred twenty-one billion, two hundred million, four hundred twenty-two thousand, fifty-two".