23447431 has 12 divisors (see below), whose sum is σ = 27464880. Its totient is φ = 19958400.

The previous prime is 23447423. The next prime is 23447441. The reversal of 23447431 is 13474432.

It is not a de Polignac number, because 23447431 - 2³ = 23447423 is a prime.

It is a super-2 number, since 2×23447431² = 1099564040999522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23447431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23447401) 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, 5815 + ... + 8983.

It is an arithmetic number, because the mean of its divisors is an integer number (2288740).

Almost surely, 2^23447431 is an apocalyptic number.

23447431 is a deficient number, since it is larger than the sum of its proper divisors (4017449).

23447431 is a wasteful number, since it uses less digits than its factorization.

23447431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3334 (or 3327 counting only the distinct ones).

The product of its digits is 8064, while the sum is 28.

The square root of 23447431 is about 4842.2547434021. The cubic root of 23447431 is about 286.2189750450.

The spelling of 23447431 in words is "twenty-three million, four hundred forty-seven thousand, four hundred thirty-one".