201647231 has 2 divisors, whose sum is σ = 201647232. Its totient is φ = 201647230.

The previous prime is 201647177. The next prime is 201647267. The reversal of 201647231 is 132746102.

201647231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201647231 is a prime.

It is a super-2 number, since 2×201647231² = 81323211539934722, 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 201647231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201647291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100823615 + 100823616.

It is an arithmetic number, because the mean of its divisors is an integer number (100823616).

Almost surely, 2^201647231 is an apocalyptic number.

201647231 is a deficient number, since it is larger than the sum of its proper divisors (1).

201647231 is an equidigital number, since it uses as much as digits as its factorization.

201647231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 201647231 is about 14200.2546103934. The cubic root of 201647231 is about 586.4046708429.

The spelling of 201647231 in words is "two hundred one million, six hundred forty-seven thousand, two hundred thirty-one".