231267421 has 12 divisors (see below), whose sum is σ = 290518816. Its totient is φ = 180207720.

The previous prime is 231267419. The next prime is 231267467. The reversal of 231267421 is 124762132.

It is not a de Polignac number, because 231267421 - 2¹ = 231267419 is a prime.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 231267421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231267521) 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, 135675 + ... + 137368.

Almost surely, 2^231267421 is an apocalyptic number.

It is an amenable number.

231267421 is a deficient number, since it is larger than the sum of its proper divisors (59251395).

231267421 is a wasteful number, since it uses less digits than its factorization.

231267421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273072 (or 273061 counting only the distinct ones).

The product of its digits is 4032, while the sum is 28.

The square root of 231267421 is about 15207.4791139097. The cubic root of 231267421 is about 613.8159260694.

The spelling of 231267421 in words is "two hundred thirty-one million, two hundred sixty-seven thousand, four hundred twenty-one".