326520631 has 2 divisors, whose sum is σ = 326520632. Its totient is φ = 326520630.

The previous prime is 326520587. The next prime is 326520697. The reversal of 326520631 is 136025623.

It is a weak prime.

It is an emirp because it is prime and its reverse (136025623) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 326520631 - 2¹⁷ = 326389559 is a prime.

It is a super-2 number, since 2×326520631² = 213231444937276322, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 326520631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (326520031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 163260315 + 163260316.

It is an arithmetic number, because the mean of its divisors is an integer number (163260316).

Almost surely, 2^326520631 is an apocalyptic number.

326520631 is a deficient number, since it is larger than the sum of its proper divisors (1).

326520631 is an equidigital number, since it uses as much as digits as its factorization.

326520631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 326520631 is about 18069.8818756515. The cubic root of 326520631 is about 688.6050590096.

The spelling of 326520631 in words is "three hundred twenty-six million, five hundred twenty thousand, six hundred thirty-one".