521314531 has 2 divisors, whose sum is σ = 521314532. Its totient is φ = 521314530.

The previous prime is 521314523. The next prime is 521314543. The reversal of 521314531 is 135413125.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 521314531 - 2³ = 521314523 is a prime.

It is a super-2 number, since 2×521314531² = 543537680463499922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 521314496 and 521314505.

It is not a weakly prime, because it can be changed into another prime (521314511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260657265 + 260657266.

It is an arithmetic number, because the mean of its divisors is an integer number (260657266).

Almost surely, 2^521314531 is an apocalyptic number.

521314531 is a deficient number, since it is larger than the sum of its proper divisors (1).

521314531 is an equidigital number, since it uses as much as digits as its factorization.

521314531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1800, while the sum is 25.

The square root of 521314531 is about 22832.3133081166. The cubic root of 521314531 is about 804.8221928961.

Adding to 521314531 its reverse (135413125), we get a palindrome (656727656).

The spelling of 521314531 in words is "five hundred twenty-one million, three hundred fourteen thousand, five hundred thirty-one".