31113133445 has 4 divisors (see below), whose sum is σ = 37335760140. Its totient is φ = 24890506752.

The previous prime is 31113133393. The next prime is 31113133489. The reversal of 31113133445 is 54433131113.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54433131113 = 17 ⋅3201948889.

It can be written as a sum of positive squares in 2 ways, for example, as 3295563649 + 27817569796 = 57407^2 + 166786^2 .

It is a cyclic number.

It is not a de Polignac number, because 31113133445 - 2³⁰ = 30039391621 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3111313340 + ... + 3111313349.

It is an arithmetic number, because the mean of its divisors is an integer number (9333940035).

Almost surely, 2^31113133445 is an apocalyptic number.

It is an amenable number.

31113133445 is a deficient number, since it is larger than the sum of its proper divisors (6222626695).

31113133445 is an equidigital number, since it uses as much as digits as its factorization.

31113133445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6222626694.

The product of its digits is 6480, while the sum is 29.

Adding to 31113133445 its reverse (54433131113), we get a palindrome (85546264558).

The spelling of 31113133445 in words is "thirty-one billion, one hundred thirteen million, one hundred thirty-three thousand, four hundred forty-five".