31322311133 has 4 divisors (see below), whose sum is σ = 31394649468. Its totient is φ = 31249972800.

The previous prime is 31322311121. The next prime is 31322311151. The reversal of 31322311133 is 33111322313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33111322313 = 929 ⋅35641897.

It can be written as a sum of positive squares in 2 ways, for example, as 13951861924 + 17370449209 = 118118^2 + 131797^2 .

It is a cyclic number.

It is not a de Polignac number, because 31322311133 - 2²² = 31318116829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31322311099 and 31322311108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31322311103) 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, 36168518 + ... + 36169383.

It is an arithmetic number, because the mean of its divisors is an integer number (7848662367).

Almost surely, 2^31322311133 is an apocalyptic number.

It is an amenable number.

31322311133 is a deficient number, since it is larger than the sum of its proper divisors (72338335).

31322311133 is an equidigital number, since it uses as much as digits as its factorization.

31322311133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72338334.

The product of its digits is 972, while the sum is 23.

Adding to 31322311133 its reverse (33111322313), we get a palindrome (64433633446).

The spelling of 31322311133 in words is "thirty-one billion, three hundred twenty-two million, three hundred eleven thousand, one hundred thirty-three".