23154431 has 4 divisors (see below), whose sum is σ = 23166864. Its totient is φ = 23142000.

The previous prime is 23154413. The next prime is 23154437. The reversal of 23154431 is 13445132.

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

It is a cyclic number.

It is not a de Polignac number, because 23154431 - 2⁶ = 23154367 is a prime.

It is a super-2 number, since 2×23154431² = 1072255349867522, 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 = 23154397 and 23154406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23154437) 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, 2795 + ... + 7356.

It is an arithmetic number, because the mean of its divisors is an integer number (5791716).

Almost surely, 2^23154431 is an apocalyptic number.

23154431 is a deficient number, since it is larger than the sum of its proper divisors (12433).

23154431 is a wasteful number, since it uses less digits than its factorization.

23154431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12432.

The product of its digits is 1440, while the sum is 23.

The square root of 23154431 is about 4811.9051320657. The cubic root of 23154431 is about 285.0217732416.

Adding to 23154431 its reverse (13445132), we get a palindrome (36599563).

The spelling of 23154431 in words is "twenty-three million, one hundred fifty-four thousand, four hundred thirty-one".