23151491 has 8 divisors (see below), whose sum is σ = 25489200. Its totient is φ = 20852640.

The previous prime is 23151473. The next prime is 23151497. The reversal of 23151491 is 19415132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23151491 - 2¹⁰ = 23150467 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23151491.

It is not an unprimeable number, because it can be changed into a prime (23151497) 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, 8456 + ... + 10853.

It is an arithmetic number, because the mean of its divisors is an integer number (3186150).

Almost surely, 2^23151491 is an apocalyptic number.

23151491 is a deficient number, since it is larger than the sum of its proper divisors (2337709).

23151491 is a wasteful number, since it uses less digits than its factorization.

23151491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19429.

The product of its digits is 1080, while the sum is 26.

The square root of 23151491 is about 4811.5996300607. The cubic root of 23151491 is about 285.0097093235.

The spelling of 23151491 in words is "twenty-three million, one hundred fifty-one thousand, four hundred ninety-one".