23021199 has 16 divisors (see below), whose sum is σ = 34179840. Its totient is φ = 15314040.

The previous prime is 23021177. The next prime is 23021203. The reversal of 23021199 is 99112032.

It is not a de Polignac number, because 23021199 - 2⁹ = 23020687 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23021149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21814 + ... + 22844.

It is an arithmetic number, because the mean of its divisors is an integer number (2136240).

Almost surely, 2^23021199 is an apocalyptic number.

23021199 is a deficient number, since it is larger than the sum of its proper divisors (11158641).

23021199 is a wasteful number, since it uses less digits than its factorization.

23021199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1867 (or 1861 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 23021199 is about 4798.0411628080. The cubic root of 23021199 is about 284.4740438162.

It can be divided in two parts, 23021 and 199, that added together give a triangular number (23220 = T₂₁₅).

The spelling of 23021199 in words is "twenty-three million, twenty-one thousand, one hundred ninety-nine".