231421034423 has 2 divisors, whose sum is σ = 231421034424. Its totient is φ = 231421034422.

The previous prime is 231421034371. The next prime is 231421034441. The reversal of 231421034423 is 324430124132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231421034423 - 2²⁴ = 231404257207 is a prime.

It is a super-2 number, since 2×231421034423² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231421034443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115710517211 + 115710517212.

It is an arithmetic number, because the mean of its divisors is an integer number (115710517212).

Almost surely, 2^231421034423 is an apocalyptic number.

231421034423 is a deficient number, since it is larger than the sum of its proper divisors (1).

231421034423 is an equidigital number, since it uses as much as digits as its factorization.

231421034423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 231421034423 its reverse (324430124132), we get a palindrome (555851158555).

The spelling of 231421034423 in words is "two hundred thirty-one billion, four hundred twenty-one million, thirty-four thousand, four hundred twenty-three".