231032421 has 12 divisors (see below), whose sum is σ = 341474848. Its totient is φ = 150439464.

The previous prime is 231032413. The next prime is 231032467. The reversal of 231032421 is 124230132.

231032421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 231032421 - 2³ = 231032413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231032394 and 231032403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231032411) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 298105 + ... + 298878.

Almost surely, 2^231032421 is an apocalyptic number.

It is an amenable number.

231032421 is a deficient number, since it is larger than the sum of its proper divisors (110442427).

231032421 is a wasteful number, since it uses less digits than its factorization.

231032421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 597032 (or 597029 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 231032421 is about 15199.7506887449. The cubic root of 231032421 is about 613.6079480385.

Adding to 231032421 its reverse (124230132), we get a palindrome (355262553).

The spelling of 231032421 in words is "two hundred thirty-one million, thirty-two thousand, four hundred twenty-one".