3121313344 has 56 divisors (see below), whose sum is σ = 6332951520. Its totient is φ = 1525899264.

The previous prime is 3121313329. The next prime is 3121313353. The reversal of 3121313344 is 4433131213.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 726627 + ... + 730909.

It is an arithmetic number, because the mean of its divisors is an integer number (113088420).

Almost surely, 2^3121313344 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3121313344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3166475760).

3121313344 is an abundant number, since it is smaller than the sum of its proper divisors (3211638176).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3121313344 is a wasteful number, since it uses less digits than its factorization.

3121313344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4547 (or 4537 counting only the distinct ones).

The product of its digits is 2592, while the sum is 25.

The square root of 3121313344 is about 55868.7152528139. The cubic root of 3121313344 is about 1461.4337176706.

Adding to 3121313344 its reverse (4433131213), we get a palindrome (7554444557).

The spelling of 3121313344 in words is "three billion, one hundred twenty-one million, three hundred thirteen thousand, three hundred forty-four".