231923011 has 2 divisors, whose sum is σ = 231923012. Its totient is φ = 231923010.

The previous prime is 231923009. The next prime is 231923017. The reversal of 231923011 is 110329132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231923011 - 2¹ = 231923009 is a prime.

It is a super-2 number, since 2×231923011² = 107576566062612242, which contains 22 as substring.

Together with 231923009, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (231923017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115961505 + 115961506.

It is an arithmetic number, because the mean of its divisors is an integer number (115961506).

Almost surely, 2^231923011 is an apocalyptic number.

231923011 is a deficient number, since it is larger than the sum of its proper divisors (1).

231923011 is an equidigital number, since it uses as much as digits as its factorization.

231923011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 231923011 is about 15229.0187142836. The cubic root of 231923011 is about 614.3953879045.

The spelling of 231923011 in words is "two hundred thirty-one million, nine hundred twenty-three thousand, eleven".