23451231 has 4 divisors (see below), whose sum is σ = 31268312. Its totient is φ = 15634152.

The previous prime is 23451223. The next prime is 23451257. The reversal of 23451231 is 13215432.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 23451231 - 2³ = 23451223 is a prime.

It is a super-2 number, since 2×23451231² = 1099920470830722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23451198 and 23451207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23451271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3908536 + ... + 3908541.

It is an arithmetic number, because the mean of its divisors is an integer number (7817078).

Almost surely, 2^23451231 is an apocalyptic number.

23451231 is a deficient number, since it is larger than the sum of its proper divisors (7817081).

23451231 is an equidigital number, since it uses as much as digits as its factorization.

23451231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7817080.

The product of its digits is 720, while the sum is 21.

The square root of 23451231 is about 4842.6471066969. The cubic root of 23451231 is about 286.2344362037.

Adding to 23451231 its reverse (13215432), we get a palindrome (36666663).

The spelling of 23451231 in words is "twenty-three million, four hundred fifty-one thousand, two hundred thirty-one".