231541291 has 2 divisors, whose sum is σ = 231541292. Its totient is φ = 231541290.

The previous prime is 231541279. The next prime is 231541313. The reversal of 231541291 is 192145132.

231541291 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 231541291 - 2¹⁵ = 231508523 is a prime.

It is a super-2 number, since 2×231541291² = 107222738875893362, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (231541091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115770645 + 115770646.

It is an arithmetic number, because the mean of its divisors is an integer number (115770646).

Almost surely, 2^231541291 is an apocalyptic number.

231541291 is a deficient number, since it is larger than the sum of its proper divisors (1).

231541291 is an equidigital number, since it uses as much as digits as its factorization.

231541291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 28.

The square root of 231541291 is about 15216.4809006551. The cubic root of 231541291 is about 614.0581268556.

The spelling of 231541291 in words is "two hundred thirty-one million, five hundred forty-one thousand, two hundred ninety-one".