23145961 has 4 divisors (see below), whose sum is σ = 23424912. Its totient is φ = 22867012.

The previous prime is 23145943. The next prime is 23145977. The reversal of 23145961 is 16954132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23145961 - 2¹³ = 23137769 is a prime.

It is a super-2 number, since 2×23145961² = 1071471021227042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23145931) 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 3 ways as a sum of consecutive naturals, for example, 139351 + ... + 139516.

It is an arithmetic number, because the mean of its divisors is an integer number (5856228).

Almost surely, 2^23145961 is an apocalyptic number.

It is an amenable number.

23145961 is a deficient number, since it is larger than the sum of its proper divisors (278951).

23145961 is an equidigital number, since it uses as much as digits as its factorization.

23145961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278950.

The product of its digits is 6480, while the sum is 31.

The square root of 23145961 is about 4811.0249427747. The cubic root of 23145961 is about 284.9870149003.

The spelling of 23145961 in words is "twenty-three million, one hundred forty-five thousand, nine hundred sixty-one".