201331399 has 2 divisors, whose sum is σ = 201331400. Its totient is φ = 201331398.

The previous prime is 201331343. The next prime is 201331433. The reversal of 201331399 is 993133102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 201331399 - 2⁷ = 201331271 is a prime.

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 201331399.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201331199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100665699 + 100665700.

It is an arithmetic number, because the mean of its divisors is an integer number (100665700).

Almost surely, 2^201331399 is an apocalyptic number.

201331399 is a deficient number, since it is larger than the sum of its proper divisors (1).

201331399 is an equidigital number, since it uses as much as digits as its factorization.

201331399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4374, while the sum is 31.

The square root of 201331399 is about 14189.1296068504. The cubic root of 201331399 is about 586.0983567971.

The spelling of 201331399 in words is "two hundred one million, three hundred thirty-one thousand, three hundred ninety-nine".