231064091 has 2 divisors, whose sum is σ = 231064092. Its totient is φ = 231064090.

The previous prime is 231064081. The next prime is 231064103. The reversal of 231064091 is 190460132.

231064091 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 231064091 - 2¹⁰ = 231063067 is a prime.

It is a super-2 number, since 2×231064091² = 106781228299312562, 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 231064091.

It is not a weakly prime, because it can be changed into another prime (231064061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115532045 + 115532046.

It is an arithmetic number, because the mean of its divisors is an integer number (115532046).

Almost surely, 2^231064091 is an apocalyptic number.

231064091 is a deficient number, since it is larger than the sum of its proper divisors (1).

231064091 is an equidigital number, since it uses as much as digits as its factorization.

231064091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 231064091 is about 15200.7924464483. The cubic root of 231064091 is about 613.6359846170.

The spelling of 231064091 in words is "two hundred thirty-one million, sixty-four thousand, ninety-one".