231021419 has 2 divisors, whose sum is σ = 231021420. Its totient is φ = 231021418.

The previous prime is 231021409. The next prime is 231021431. The reversal of 231021419 is 914120132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231021419 - 2²⁴ = 214244203 is a prime.

It is a super-2 number, since 2×231021419² = 106741792073547122, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 231021394 and 231021403.

It is not a weakly prime, because it can be changed into another prime (231021409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115510709 + 115510710.

It is an arithmetic number, because the mean of its divisors is an integer number (115510710).

Almost surely, 2^231021419 is an apocalyptic number.

231021419 is a deficient number, since it is larger than the sum of its proper divisors (1).

231021419 is an equidigital number, since it uses as much as digits as its factorization.

231021419 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 231021419 is about 15199.3887706052. The cubic root of 231021419 is about 613.5982076713.

The spelling of 231021419 in words is "two hundred thirty-one million, twenty-one thousand, four hundred nineteen".