23195890271 has 4 divisors (see below), whose sum is σ = 23633548632. Its totient is φ = 22758231912.

The previous prime is 23195890229. The next prime is 23195890339. The reversal of 23195890271 is 17209859132.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23195890271 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23195890171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218829101 + ... + 218829206.

It is an arithmetic number, because the mean of its divisors is an integer number (5908387158).

Almost surely, 2^23195890271 is an apocalyptic number.

23195890271 is a deficient number, since it is larger than the sum of its proper divisors (437658361).

23195890271 is an equidigital number, since it uses as much as digits as its factorization.

23195890271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437658360.

The product of its (nonzero) digits is 272160, while the sum is 47.

The spelling of 23195890271 in words is "twenty-three billion, one hundred ninety-five million, eight hundred ninety thousand, two hundred seventy-one".