23109057 has 24 divisors (see below), whose sum is σ = 35206080. Its totient is φ = 15143760.

The previous prime is 23109049. The next prime is 23109059. The reversal of 23109057 is 75090132.

It is not a de Polignac number, because 23109057 - 2³ = 23109049 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 23109057.

It is not an unprimeable number, because it can be changed into a prime (23109059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14044 + ... + 15602.

It is an arithmetic number, because the mean of its divisors is an integer number (1466920).

Almost surely, 2^23109057 is an apocalyptic number.

23109057 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

23109057 is a deficient number, since it is larger than the sum of its proper divisors (12097023).

23109057 is an equidigital number, since it uses as much as digits as its factorization.

23109057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1635 (or 1623 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 27.

The square root of 23109057 is about 4807.1880554020. The cubic root of 23109057 is about 284.8354729058.

Adding to 23109057 its reverse (75090132), we get a palindrome (98199189).

The spelling of 23109057 in words is "twenty-three million, one hundred nine thousand, fifty-seven".