521315223 has 32 divisors (see below), whose sum is σ = 844784640. Its totient is φ = 281581440.

The previous prime is 521315219. The next prime is 521315227. The reversal of 521315223 is 322513125.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (521315219) and next prime (521315227).

It is not a de Polignac number, because 521315223 - 2² = 521315219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 521315193 and 521315202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521315227) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8511 + ... + 33392.

It is an arithmetic number, because the mean of its divisors is an integer number (26399520).

Almost surely, 2^521315223 is an apocalyptic number.

521315223 is a deficient number, since it is larger than the sum of its proper divisors (323469417).

521315223 is a wasteful number, since it uses less digits than its factorization.

521315223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41959.

The product of its digits is 1800, while the sum is 24.

The square root of 521315223 is about 22832.3284620732. The cubic root of 521315223 is about 804.8225490066.

Adding to 521315223 its reverse (322513125), we get a palindrome (843828348).

The spelling of 521315223 in words is "five hundred twenty-one million, three hundred fifteen thousand, two hundred twenty-three".