23051091 has 16 divisors (see below), whose sum is σ = 35469824. Its totient is φ = 13042944.

The previous prime is 23051081. The next prime is 23051183. The reversal of 23051091 is 19015032.

It is not a de Polignac number, because 23051091 - 2⁵ = 23051059 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23051051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3166 + ... + 7491.

It is an arithmetic number, because the mean of its divisors is an integer number (2216864).

Almost surely, 2^23051091 is an apocalyptic number.

23051091 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

23051091 is a deficient number, since it is larger than the sum of its proper divisors (12418733).

23051091 is a wasteful number, since it uses less digits than its factorization.

23051091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10770.

The product of its (nonzero) digits is 270, while the sum is 21.

The square root of 23051091 is about 4801.1551734973. The cubic root of 23051091 is about 284.5971161824.

The spelling of 23051091 in words is "twenty-three million, fifty-one thousand, ninety-one".