23161619 has 12 divisors (see below), whose sum is σ = 25895232. Its totient is φ = 20685600.

The previous prime is 23161613. The next prime is 23161643. The reversal of 23161619 is 91616132.

It is not a de Polignac number, because 23161619 - 2⁸ = 23161363 is a prime.

It is a super-2 number, since 2×23161619² = 1072921189402322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23161591 and 23161600.

It is not an unprimeable number, because it can be changed into a prime (23161613) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3029 + ... + 7449.

It is an arithmetic number, because the mean of its divisors is an integer number (2157936).

Almost surely, 2^23161619 is an apocalyptic number.

23161619 is a deficient number, since it is larger than the sum of its proper divisors (2733613).

23161619 is a wasteful number, since it uses less digits than its factorization.

23161619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4478 (or 4465 counting only the distinct ones).

The product of its digits is 1944, while the sum is 29.

The square root of 23161619 is about 4812.6519716265. The cubic root of 23161619 is about 285.0512639907.

The spelling of 23161619 in words is "twenty-three million, one hundred sixty-one thousand, six hundred nineteen".