23157641 has 4 divisors (see below), whose sum is σ = 24939012. Its totient is φ = 21376272.

The previous prime is 23157623. The next prime is 23157643. The reversal of 23157641 is 14675132.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2190400 + 20967241 = 1480^2 + 4579^2 .

It is a cyclic number.

It is not a de Polignac number, because 23157641 - 2¹⁸ = 22895497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23157643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 890666 + ... + 890691.

It is an arithmetic number, because the mean of its divisors is an integer number (6234753).

Almost surely, 2^23157641 is an apocalyptic number.

It is an amenable number.

23157641 is a deficient number, since it is larger than the sum of its proper divisors (1781371).

23157641 is a wasteful number, since it uses less digits than its factorization.

23157641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1781370.

The product of its digits is 5040, while the sum is 29.

The square root of 23157641 is about 4812.2386682292. The cubic root of 23157641 is about 285.0349439045.

The spelling of 23157641 in words is "twenty-three million, one hundred fifty-seven thousand, six hundred forty-one".