23131103213 has 4 divisors (see below), whose sum is σ = 23141246268. Its totient is φ = 23120960160.

The previous prime is 23131103137. The next prime is 23131103263. The reversal of 23131103213 is 31230113132.

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

It can be written as a sum of positive squares in 2 ways, for example, as 16286353924 + 6844749289 = 127618^2 + 82733^2 .

It is a cyclic number.

It is not a de Polignac number, because 23131103213 - 2⁸ = 23131102957 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 (23131103263) 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, 5068106 + ... + 5072667.

It is an arithmetic number, because the mean of its divisors is an integer number (5785311567).

Almost surely, 2^23131103213 is an apocalyptic number.

It is an amenable number.

23131103213 is a deficient number, since it is larger than the sum of its proper divisors (10143055).

23131103213 is a wasteful number, since it uses less digits than its factorization.

23131103213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10143054.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 23131103213 its reverse (31230113132), we get a palindrome (54361216345).

The spelling of 23131103213 in words is "twenty-three billion, one hundred thirty-one million, one hundred three thousand, two hundred thirteen".