231423043221 has 32 divisors (see below), whose sum is σ = 344073536640. Its totient is φ = 153731808000.

The previous prime is 231423043207. The next prime is 231423043237. The reversal of 231423043221 is 122340324132.

231423043221 is a `hidden beast` number, since 2 + 31 + 4 + 2 + 304 + 322 + 1 = 666.

It is not a de Polignac number, because 231423043221 - 2¹⁵ = 231423010453 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231423043921) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10502011 + ... + 10524023.

It is an arithmetic number, because the mean of its divisors is an integer number (10752298020).

Almost surely, 2^231423043221 is an apocalyptic number.

It is an amenable number.

231423043221 is a deficient number, since it is larger than the sum of its proper divisors (112650493419).

231423043221 is a wasteful number, since it uses less digits than its factorization.

231423043221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23394 (or 23388 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 231423043221 its reverse (122340324132), we get a palindrome (353763367353).

The spelling of 231423043221 in words is "two hundred thirty-one billion, four hundred twenty-three million, forty-three thousand, two hundred twenty-one".