231435019 has 2 divisors, whose sum is σ = 231435020. Its totient is φ = 231435018.

The previous prime is 231434981. The next prime is 231435041. The reversal of 231435019 is 910534132.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231435019 is a prime.

It is a super-2 number, since 2×231435019² = 107124336039060722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (231435049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115717509 + 115717510.

It is an arithmetic number, because the mean of its divisors is an integer number (115717510).

Almost surely, 2^231435019 is an apocalyptic number.

231435019 is a deficient number, since it is larger than the sum of its proper divisors (1).

231435019 is an equidigital number, since it uses as much as digits as its factorization.

231435019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 231435019 is about 15212.9884966761. The cubic root of 231435019 is about 613.9641664057.

The spelling of 231435019 in words is "two hundred thirty-one million, four hundred thirty-five thousand, nineteen".