23161859 has 6 divisors (see below), whose sum is σ = 26943444. Its totient is φ = 19852980.

The previous prime is 23161849. The next prime is 23161861. The reversal of 23161859 is 95816132.

It is a de Polignac number, because none of the positive numbers 2^k-23161859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23161819) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 236297 + ... + 236394.

It is an arithmetic number, because the mean of its divisors is an integer number (4490574).

Almost surely, 2^23161859 is an apocalyptic number.

23161859 is a deficient number, since it is larger than the sum of its proper divisors (3781585).

23161859 is an equidigital number, since it uses as much as digits as its factorization.

23161859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472705 (or 472698 counting only the distinct ones).

The product of its digits is 12960, while the sum is 35.

The square root of 23161859 is about 4812.6769058394. The cubic root of 23161859 is about 285.0522485515.

The spelling of 23161859 in words is "twenty-three million, one hundred sixty-one thousand, eight hundred fifty-nine".