231057019 has 2 divisors, whose sum is σ = 231057020. Its totient is φ = 231057018.

The previous prime is 231056999. The next prime is 231057041. The reversal of 231057019 is 910750132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231057019 - 2¹³ = 231048827 is a prime.

It is a super-2 number, since 2×231057019² = 106774692058332722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (231057419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115528509 + 115528510.

It is an arithmetic number, because the mean of its divisors is an integer number (115528510).

Almost surely, 2^231057019 is an apocalyptic number.

231057019 is a deficient number, since it is larger than the sum of its proper divisors (1).

231057019 is an equidigital number, since it uses as much as digits as its factorization.

231057019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 231057019 is about 15200.5598252170. The cubic root of 231057019 is about 613.6297241924.

The spelling of 231057019 in words is "two hundred thirty-one million, fifty-seven thousand, nineteen".