23156398243 has 4 divisors (see below), whose sum is σ = 25261525368. Its totient is φ = 21051271120.

The previous prime is 23156398211. The next prime is 23156398253. The reversal of 23156398243 is 34289365132.

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

It is not a de Polignac number, because 23156398243 - 2⁵ = 23156398211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23156398193 and 23156398202.

It is not an unprimeable number, because it can be changed into a prime (23156398253) 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, 1052563546 + ... + 1052563567.

It is an arithmetic number, because the mean of its divisors is an integer number (6315381342).

Almost surely, 2^23156398243 is an apocalyptic number.

23156398243 is a deficient number, since it is larger than the sum of its proper divisors (2105127125).

23156398243 is a wasteful number, since it uses less digits than its factorization.

23156398243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2105127124.

The product of its digits is 933120, while the sum is 46.

The spelling of 23156398243 in words is "twenty-three billion, one hundred fifty-six million, three hundred ninety-eight thousand, two hundred forty-three".