521338797 has 24 divisors (see below), whose sum is σ = 864077760. Its totient is φ = 296712000.

The previous prime is 521338781. The next prime is 521338823. The reversal of 521338797 is 797833125.

It is a happy number.

521338797 is a `hidden beast` number, since 521 + 3 + 38 + 7 + 97 = 666.

It is not a de Polignac number, because 521338797 - 2⁴ = 521338781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521333797) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 672 + ... + 32297.

It is an arithmetic number, because the mean of its divisors is an integer number (36003240).

Almost surely, 2^521338797 is an apocalyptic number.

It is an amenable number.

521338797 is a deficient number, since it is larger than the sum of its proper divisors (342738963).

521338797 is a wasteful number, since it uses less digits than its factorization.

521338797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33233 (or 33230 counting only the distinct ones).

The product of its digits is 317520, while the sum is 45.

The square root of 521338797 is about 22832.8446979346. The cubic root of 521338797 is about 804.8346802469.

The spelling of 521338797 in words is "five hundred twenty-one million, three hundred thirty-eight thousand, seven hundred ninety-seven".