23131303303331 has 4 divisors (see below), whose sum is σ = 23877474377664. Its totient is φ = 22385132229000.

The previous prime is 23131303303291. The next prime is 23131303303379. The reversal of 23131303303331 is 13330330313132.

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-23131303303331 is a prime.

It is a super-2 number, since 2×23131303303331² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23131303303294 and 23131303303303.

It is not an unprimeable number, because it can be changed into a prime (23131303303231) 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, 373085537120 + ... + 373085537181.

It is an arithmetic number, because the mean of its divisors is an integer number (5969368594416).

Almost surely, 2^{23131303303331} is an apocalyptic number.

23131303303331 is a deficient number, since it is larger than the sum of its proper divisors (746171074333).

23131303303331 is an equidigital number, since it uses as much as digits as its factorization.

23131303303331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 746171074332.

The product of its (nonzero) digits is 13122, while the sum is 29.

Adding to 23131303303331 its reverse (13330330313132), we get a palindrome (36461633616463).

The spelling of 23131303303331 in words is "twenty-three trillion, one hundred thirty-one billion, three hundred three million, three hundred three thousand, three hundred thirty-one".