31323142223311 has 4 divisors (see below), whose sum is σ = 31323198795624. Its totient is φ = 31323085651000.

The previous prime is 31323142223287. The next prime is 31323142223353. The reversal of 31323142223311 is 11332224132313.

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

It is a cyclic number.

It is not a de Polignac number, because 31323142223311 - 2¹³ = 31323142215119 is a prime.

It is a super-2 number, since 2×31323142223311² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31323142223381) 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, 27447340 + ... + 28565761.

It is an arithmetic number, because the mean of its divisors is an integer number (7830799698906).

Almost surely, 2^{31323142223311} is an apocalyptic number.

31323142223311 is a deficient number, since it is larger than the sum of its proper divisors (56572313).

31323142223311 is an equidigital number, since it uses as much as digits as its factorization.

31323142223311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56572312.

The product of its digits is 15552, while the sum is 31.

Adding to 31323142223311 its reverse (11332224132313), we get a palindrome (42655366355624).

The spelling of 31323142223311 in words is "thirty-one trillion, three hundred twenty-three billion, one hundred forty-two million, two hundred twenty-three thousand, three hundred eleven".