23711157 has 8 divisors (see below), whose sum is σ = 35127680. Its totient is φ = 15807420.

The previous prime is 23711153. The next prime is 23711159. The reversal of 23711157 is 75111732.

It is a happy number.

It is not a de Polignac number, because 23711157 - 2² = 23711153 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 878191 = 23711157 / (2 + 3 + 7 + 1 + 1 + 1 + 5 + 7).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23711157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23711153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 439069 + ... + 439122.

It is an arithmetic number, because the mean of its divisors is an integer number (4390960).

Almost surely, 2^23711157 is an apocalyptic number.

23711157 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

23711157 is a deficient number, since it is larger than the sum of its proper divisors (11416523).

23711157 is an equidigital number, since it uses as much as digits as its factorization.

23711157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 878200 (or 878194 counting only the distinct ones).

The product of its digits is 1470, while the sum is 27.

The square root of 23711157 is about 4869.4103339111. The cubic root of 23711157 is about 287.2880635910.

Adding to 23711157 its reverse (75111732), we get a palindrome (98822889).

The spelling of 23711157 in words is "twenty-three million, seven hundred eleven thousand, one hundred fifty-seven".