3112135981 has 4 divisors (see below), whose sum is σ = 3141221472. Its totient is φ = 3083050492.

The previous prime is 3112135969. The next prime is 3112136011. The reversal of 3112135981 is 1895312113.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 3112135981 - 2⁹ = 3112135469 is a prime.

It is a super-2 number, since 2×3112135981² = 19370780728469664722, which 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 (3112135921) 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, 14542585 + ... + 14542798.

It is an arithmetic number, because the mean of its divisors is an integer number (785305368).

Almost surely, 2^3112135981 is an apocalyptic number.

It is an amenable number.

3112135981 is a deficient number, since it is larger than the sum of its proper divisors (29085491).

3112135981 is a wasteful number, since it uses less digits than its factorization.

3112135981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29085490.

The product of its digits is 6480, while the sum is 34.

The square root of 3112135981 is about 55786.5214993729. The cubic root of 3112135981 is about 1459.9999970288. Note that the first 5 decimals are identical.

The spelling of 3112135981 in words is "three billion, one hundred twelve million, one hundred thirty-five thousand, nine hundred eighty-one".