231930019 has 2 divisors, whose sum is σ = 231930020. Its totient is φ = 231930018.

The previous prime is 231930011. The next prime is 231930073. The reversal of 231930019 is 910039132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231930019 - 2³ = 231930011 is a prime.

It is a super-2 number, since 2×231930019² = 107583067426680722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (231930011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115965009 + 115965010.

It is an arithmetic number, because the mean of its divisors is an integer number (115965010).

Almost surely, 2^231930019 is an apocalyptic number.

231930019 is a deficient number, since it is larger than the sum of its proper divisors (1).

231930019 is an equidigital number, since it uses as much as digits as its factorization.

231930019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1458, while the sum is 28.

The square root of 231930019 is about 15229.2487995961. The cubic root of 231930019 is about 614.4015762218.

The spelling of 231930019 in words is "two hundred thirty-one million, nine hundred thirty thousand, nineteen".