23072157 has 12 divisors (see below), whose sum is σ = 33437664. Its totient is φ = 15330120.

The previous prime is 23072131. The next prime is 23072167. The reversal of 23072157 is 75127032.

It is not a de Polignac number, because 23072157 - 2⁸ = 23071901 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23072157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23072117) 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 11 ways as a sum of consecutive naturals, for example, 1323 + ... + 6920.

It is an arithmetic number, because the mean of its divisors is an integer number (2786472).

Almost surely, 2^23072157 is an apocalyptic number.

It is an amenable number.

23072157 is a deficient number, since it is larger than the sum of its proper divisors (10365507).

23072157 is a wasteful number, since it uses less digits than its factorization.

23072157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8560 (or 8557 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 27.

The square root of 23072157 is about 4803.3485195226. The cubic root of 23072157 is about 284.6837859404.

Adding to 23072157 its reverse (75127032), we get a palindrome (98199189).

The spelling of 23072157 in words is "twenty-three million, seventy-two thousand, one hundred fifty-seven".