522521431 has 4 divisors (see below), whose sum is σ = 523114072. Its totient is φ = 521928792.

The previous prime is 522521411. The next prime is 522521459. The reversal of 522521431 is 134125225.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 522521431 - 2¹³ = 522513239 is a prime.

It is a super-2 number, since 2×522521431² = 546057291708575522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 522521396 and 522521405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (522521411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 294996 + ... + 296761.

It is an arithmetic number, because the mean of its divisors is an integer number (130778518).

Almost surely, 2^522521431 is an apocalyptic number.

522521431 is a deficient number, since it is larger than the sum of its proper divisors (592641).

522521431 is an equidigital number, since it uses as much as digits as its factorization.

522521431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 592640.

The product of its digits is 2400, while the sum is 25.

The square root of 522521431 is about 22858.7276767540. The cubic root of 522521431 is about 805.4427979394.

Adding to 522521431 its reverse (134125225), we get a palindrome (656646656).

The spelling of 522521431 in words is "five hundred twenty-two million, five hundred twenty-one thousand, four hundred thirty-one".