231421499 has 2 divisors, whose sum is σ = 231421500. Its totient is φ = 231421498.

The previous prime is 231421483. The next prime is 231421523. The reversal of 231421499 is 994124132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231421499 - 2⁴ = 231421483 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (231421409) 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, 115710749 + 115710750.

It is an arithmetic number, because the mean of its divisors is an integer number (115710750).

Almost surely, 2^231421499 is an apocalyptic number.

231421499 is a deficient number, since it is larger than the sum of its proper divisors (1).

231421499 is an equidigital number, since it uses as much as digits as its factorization.

231421499 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 35.

The square root of 231421499 is about 15212.5441330502. The cubic root of 231421499 is about 613.9522106276.

The spelling of 231421499 in words is "two hundred thirty-one million, four hundred twenty-one thousand, four hundred ninety-nine".