231645319 has 2 divisors, whose sum is σ = 231645320. Its totient is φ = 231645318.

The previous prime is 231645317. The next prime is 231645329. The reversal of 231645319 is 913546132.

231645319 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 231645319 - 2¹ = 231645317 is a prime.

It is a super-2 number, since 2×231645319² = 107319107629223522, which contains 22 as substring.

Together with 231645317, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231645313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115822659 + 115822660.

It is an arithmetic number, because the mean of its divisors is an integer number (115822660).

Almost surely, 2^231645319 is an apocalyptic number.

231645319 is a deficient number, since it is larger than the sum of its proper divisors (1).

231645319 is an equidigital number, since it uses as much as digits as its factorization.

231645319 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19440, while the sum is 34.

The square root of 231645319 is about 15219.8987841575. The cubic root of 231645319 is about 614.1500754296.

The spelling of 231645319 in words is "two hundred thirty-one million, six hundred forty-five thousand, three hundred nineteen".