521225055 has 48 divisors (see below), whose sum is σ = 991370016. Its totient is φ = 251746560.

The previous prime is 521225039. The next prime is 521225113. The reversal of 521225055 is 550522125.

It is not a de Polignac number, because 521225055 - 2⁴ = 521225039 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 22600 + ... + 39410.

It is an arithmetic number, because the mean of its divisors is an integer number (20653542).

Almost surely, 2^521225055 is an apocalyptic number.

521225055 is a deficient number, since it is larger than the sum of its proper divisors (470144961).

521225055 is a wasteful number, since it uses less digits than its factorization.

521225055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16888 (or 16885 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 27.

The square root of 521225055 is about 22830.3538080337. The cubic root of 521225055 is about 804.7761449496.

The spelling of 521225055 in words is "five hundred twenty-one million, two hundred twenty-five thousand, fifty-five".