201390331 has 2 divisors, whose sum is σ = 201390332. Its totient is φ = 201390330.

The previous prime is 201390317. The next prime is 201390349. The reversal of 201390331 is 133093102.

201390331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 201390331 - 2²¹ = 199293179 is a prime.

It is a super-2 number, since 2×201390331² = 81116130840579122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (201390391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100695165 + 100695166.

It is an arithmetic number, because the mean of its divisors is an integer number (100695166).

Almost surely, 2^201390331 is an apocalyptic number.

201390331 is a deficient number, since it is larger than the sum of its proper divisors (1).

201390331 is an equidigital number, since it uses as much as digits as its factorization.

201390331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 486, while the sum is 22.

The square root of 201390331 is about 14191.2061150559. The cubic root of 201390331 is about 586.1555371127.

The spelling of 201390331 in words is "two hundred one million, three hundred ninety thousand, three hundred thirty-one".