521331797 has 8 divisors (see below), whose sum is σ = 607049856. Its totient is φ = 438424272.

The previous prime is 521331787. The next prime is 521331827. The reversal of 521331797 is 797133125.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 521331797 - 2¹⁰ = 521330773 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 521331797.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521331787) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 702233 + ... + 702974.

It is an arithmetic number, because the mean of its divisors is an integer number (75881232).

Almost surely, 2^521331797 is an apocalyptic number.

It is an amenable number.

521331797 is a deficient number, since it is larger than the sum of its proper divisors (85718059).

521331797 is a wasteful number, since it uses less digits than its factorization.

521331797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1405267.

The product of its digits is 39690, while the sum is 38.

The square root of 521331797 is about 22832.6914094681. The cubic root of 521331797 is about 804.8310780673.

The spelling of 521331797 in words is "five hundred twenty-one million, three hundred thirty-one thousand, seven hundred ninety-seven".