23149355 has 4 divisors (see below), whose sum is σ = 27779232. Its totient is φ = 18519480.

The previous prime is 23149319. The next prime is 23149363. The reversal of 23149355 is 55394132.

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

It is not a de Polignac number, because 23149355 - 2¹⁰ = 23148331 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2314931 + ... + 2314940.

It is an arithmetic number, because the mean of its divisors is an integer number (6944808).

Almost surely, 2^23149355 is an apocalyptic number.

23149355 is a deficient number, since it is larger than the sum of its proper divisors (4629877).

23149355 is an equidigital number, since it uses as much as digits as its factorization.

23149355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4629876.

The product of its digits is 16200, while the sum is 32.

The square root of 23149355 is about 4811.3776613357. The cubic root of 23149355 is about 285.0009438770. Note that the first 3 decimals are identical.

The spelling of 23149355 in words is "twenty-three million, one hundred forty-nine thousand, three hundred fifty-five".