23154391 has 12 divisors (see below), whose sum is σ = 26492872. Its totient is φ = 20112768.

The previous prime is 23154377. The next prime is 23154401. The reversal of 23154391 is 19345132.

It is a de Polignac number, because none of the positive numbers 2^k-23154391 is a prime.

It is a super-2 number, since 2×23154391² = 1072251645161762, which contains 22 as substring.

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 Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23154361) 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, 676 + ... + 6838.

Almost surely, 2^23154391 is an apocalyptic number.

23154391 is a deficient number, since it is larger than the sum of its proper divisors (3338481).

23154391 is a wasteful number, since it uses less digits than its factorization.

23154391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6210 (or 6193 counting only the distinct ones).

The product of its digits is 3240, while the sum is 28.

The square root of 23154391 is about 4811.9009757060. The cubic root of 23154391 is about 285.0216091136.

The spelling of 23154391 in words is "twenty-three million, one hundred fifty-four thousand, three hundred ninety-one".