23157705 has 16 divisors (see below), whose sum is σ = 37160640. Its totient is φ = 12314688.

The previous prime is 23157703. The next prime is 23157721. The reversal of 23157705 is 50775132.

It is not a de Polignac number, because 23157705 - 2¹ = 23157703 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23157703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3526 + ... + 7664.

It is an arithmetic number, because the mean of its divisors is an integer number (2322540).

Almost surely, 2^23157705 is an apocalyptic number.

It is an amenable number.

23157705 is a deficient number, since it is larger than the sum of its proper divisors (14002935).

23157705 is a wasteful number, since it uses less digits than its factorization.

23157705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4520.

The product of its (nonzero) digits is 7350, while the sum is 30.

The square root of 23157705 is about 4812.2453179363. The cubic root of 23157705 is about 285.0352064848.

The spelling of 23157705 in words is "twenty-three million, one hundred fifty-seven thousand, seven hundred five".