231022421 has 8 divisors (see below), whose sum is σ = 264133440. Its totient is φ = 197938368.

The previous prime is 231022417. The next prime is 231022453. The reversal of 231022421 is 124220132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 231022421 - 2² = 231022417 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 231022421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231022411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17390 + ... + 27648.

It is an arithmetic number, because the mean of its divisors is an integer number (33016680).

Almost surely, 2^231022421 is an apocalyptic number.

It is an amenable number.

231022421 is a deficient number, since it is larger than the sum of its proper divisors (33111019).

231022421 is a wasteful number, since it uses less digits than its factorization.

231022421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13483.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 231022421 is about 15199.4217324213. The cubic root of 231022421 is about 613.5990947817.

Adding to 231022421 its reverse (124220132), we get a palindrome (355242553).

The spelling of 231022421 in words is "two hundred thirty-one million, twenty-two thousand, four hundred twenty-one".