23872191 has 16 divisors (see below), whose sum is σ = 37632000. Its totient is φ = 13170528.

The previous prime is 23872187. The next prime is 23872223. The reversal of 23872191 is 19127832.

It is not a de Polignac number, because 23872191 - 2² = 23872187 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23872111) 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, 18991 + ... + 20208.

It is an arithmetic number, because the mean of its divisors is an integer number (2352000).

Almost surely, 2^23872191 is an apocalyptic number.

23872191 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

23872191 is a deficient number, since it is larger than the sum of its proper divisors (13759809).

23872191 is a wasteful number, since it uses less digits than its factorization.

23872191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39238.

The product of its digits is 6048, while the sum is 33.

The square root of 23872191 is about 4885.9176210820. The cubic root of 23872191 is about 287.9369677836.

The spelling of 23872191 in words is "twenty-three million, eight hundred seventy-two thousand, one hundred ninety-one".