521352331 has 2 divisors, whose sum is σ = 521352332. Its totient is φ = 521352330.

The previous prime is 521352317. The next prime is 521352347. The reversal of 521352331 is 133253125.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 521352331 - 2⁹ = 521351819 is a prime.

It is a super-2 number, since 2×521352331² = 543616506078267122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 521352296 and 521352305.

It is not a weakly prime, because it can be changed into another prime (521352301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260676165 + 260676166.

It is an arithmetic number, because the mean of its divisors is an integer number (260676166).

Almost surely, 2^521352331 is an apocalyptic number.

521352331 is a deficient number, since it is larger than the sum of its proper divisors (1).

521352331 is an equidigital number, since it uses as much as digits as its factorization.

521352331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2700, while the sum is 25.

The square root of 521352331 is about 22833.1410673170. The cubic root of 521352331 is about 804.8416447125.

The spelling of 521352331 in words is "five hundred twenty-one million, three hundred fifty-two thousand, three hundred thirty-one".