23231421 has 8 divisors (see below), whose sum is σ = 34416960. Its totient is φ = 15487596.

The previous prime is 23231399. The next prime is 23231473. The reversal of 23231421 is 12413232.

It is not a de Polignac number, because 23231421 - 2¹¹ = 23229373 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23231394 and 23231403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23231491) 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, 430185 + ... + 430238.

It is an arithmetic number, because the mean of its divisors is an integer number (4302120).

Almost surely, 2^23231421 is an apocalyptic number.

It is an amenable number.

23231421 is a deficient number, since it is larger than the sum of its proper divisors (11185539).

23231421 is an equidigital number, since it uses as much as digits as its factorization.

23231421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 860432 (or 860426 counting only the distinct ones).

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

The square root of 23231421 is about 4819.8984429135. The cubic root of 23231421 is about 285.3373291079.

Adding to 23231421 its reverse (12413232), we get a palindrome (35644653).

The spelling of 23231421 in words is "twenty-three million, two hundred thirty-one thousand, four hundred twenty-one".