521373885 has 16 divisors (see below), whose sum is σ = 834800640. Its totient is φ = 277865280.

The previous prime is 521373883. The next prime is 521373907. The reversal of 521373885 is 588373125.

It is not a de Polignac number, because 521373885 - 2¹ = 521373883 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521373883) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10251 + ... + 33879.

It is an arithmetic number, because the mean of its divisors is an integer number (52175040).

Almost surely, 2^521373885 is an apocalyptic number.

It is an amenable number.

521373885 is a deficient number, since it is larger than the sum of its proper divisors (313426755).

521373885 is a wasteful number, since it uses less digits than its factorization.

521373885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25108.

The product of its digits is 201600, while the sum is 42.

The square root of 521373885 is about 22833.6130518146. The cubic root of 521373885 is about 804.8527359437.

The spelling of 521373885 in words is "five hundred twenty-one million, three hundred seventy-three thousand, eight hundred eighty-five".