521426918 has 8 divisors (see below), whose sum is σ = 823305720. Its totient is φ = 246991680.

The previous prime is 521426909. The next prime is 521426921. The reversal of 521426918 is 819624125.

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

It is a Harshad number since it is a multiple of its sum of digits (38), and also a Moran number because the ratio is a prime number: 13721761 = 521426918 / (5 + 2 + 1 + 4 + 2 + 6 + 9 + 1 + 8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6860843 + ... + 6860918.

It is an arithmetic number, because the mean of its divisors is an integer number (102913215).

Almost surely, 2^521426918 is an apocalyptic number.

521426918 is a deficient number, since it is larger than the sum of its proper divisors (301878802).

521426918 is a wasteful number, since it uses less digits than its factorization.

521426918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13721782.

The product of its digits is 34560, while the sum is 38.

The square root of 521426918 is about 22834.7743146281. The cubic root of 521426918 is about 804.8800242994.

The spelling of 521426918 in words is "five hundred twenty-one million, four hundred twenty-six thousand, nine hundred eighteen".