23223131321 has 4 divisors (see below), whose sum is σ = 25009526052. Its totient is φ = 21436736592.

The previous prime is 23223131297. The next prime is 23223131341. The reversal of 23223131321 is 12313132232.

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 2296326400 + 20926804921 = 47920^2 + 144661^2 .

It is a cyclic number.

It is not a de Polignac number, because 23223131321 - 2¹⁰ = 23223130297 is a prime.

It is a super-2 number, since 2×23223131321² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23223131341) 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, 893197346 + ... + 893197371.

It is an arithmetic number, because the mean of its divisors is an integer number (6252381513).

Almost surely, 2^23223131321 is an apocalyptic number.

It is an amenable number.

23223131321 is a deficient number, since it is larger than the sum of its proper divisors (1786394731).

23223131321 is a wasteful number, since it uses less digits than its factorization.

23223131321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1786394730.

The product of its digits is 1296, while the sum is 23.

Adding to 23223131321 its reverse (12313132232), we get a palindrome (35536263553).

The spelling of 23223131321 in words is "twenty-three billion, two hundred twenty-three million, one hundred thirty-one thousand, three hundred twenty-one".