23031301331 has 4 divisors (see below), whose sum is σ = 23043772752. Its totient is φ = 23018829912.

The previous prime is 23031301291. The next prime is 23031301333. The reversal of 23031301331 is 13310313032.

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-23031301331 is a prime.

It is a super-2 number, since 2×23031301331² (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 (23031301333) 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, 6232940 + ... + 6236633.

It is an arithmetic number, because the mean of its divisors is an integer number (5760943188).

Almost surely, 2^23031301331 is an apocalyptic number.

23031301331 is a deficient number, since it is larger than the sum of its proper divisors (12471421).

23031301331 is a wasteful number, since it uses less digits than its factorization.

23031301331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12471420.

The product of its (nonzero) digits is 486, while the sum is 20.

Adding to 23031301331 its reverse (13310313032), we get a palindrome (36341614363).

The spelling of 23031301331 in words is "twenty-three billion, thirty-one million, three hundred one thousand, three hundred thirty-one".