231210019 has 2 divisors, whose sum is σ = 231210020. Its totient is φ = 231210018.

The previous prime is 231210017. The next prime is 231210041. The reversal of 231210019 is 910012132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231210019 - 2¹ = 231210017 is a prime.

It is a super-2 number, since 2×231210019² = 106916145771960722, which contains 22 as substring.

Together with 231210017, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 231209978 and 231210005.

It is not a weakly prime, because it can be changed into another prime (231210017) 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, 115605009 + 115605010.

It is an arithmetic number, because the mean of its divisors is an integer number (115605010).

Almost surely, 2^231210019 is an apocalyptic number.

231210019 is a deficient number, since it is larger than the sum of its proper divisors (1).

231210019 is an equidigital number, since it uses as much as digits as its factorization.

231210019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 231210019 is about 15205.5917017392. The cubic root of 231210019 is about 613.7651375678.

The spelling of 231210019 in words is "two hundred thirty-one million, two hundred ten thousand, nineteen".