201604331 has 2 divisors, whose sum is σ = 201604332. Its totient is φ = 201604330.

The previous prime is 201604327. The next prime is 201604369. The reversal of 201604331 is 133406102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 201604331 - 2² = 201604327 is a prime.

It is a super-2 number, since 2×201604331² = 81288612555915122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (201604321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100802165 + 100802166.

It is an arithmetic number, because the mean of its divisors is an integer number (100802166).

Almost surely, 2^201604331 is an apocalyptic number.

201604331 is a deficient number, since it is larger than the sum of its proper divisors (1).

201604331 is an equidigital number, since it uses as much as digits as its factorization.

201604331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 201604331 is about 14198.7439937482. The cubic root of 201604331 is about 586.3630824636.

The spelling of 201604331 in words is "two hundred one million, six hundred four thousand, three hundred thirty-one".