31212413344 has 96 divisors (see below), whose sum is σ = 71130407040. Its totient is φ = 13205763072.

The previous prime is 31212413341. The next prime is 31212413387. The reversal of 31212413344 is 44331421213.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (31212413341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7151707 + ... + 7156069.

It is an arithmetic number, because the mean of its divisors is an integer number (740941740).

Almost surely, 2^31212413344 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 31212413344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35565203520).

31212413344 is an abundant number, since it is smaller than the sum of its proper divisors (39917993696).

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

31212413344 is a wasteful number, since it uses less digits than its factorization.

31212413344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4782 (or 4774 counting only the distinct ones).

The product of its digits is 6912, while the sum is 28.

Adding to 31212413344 its reverse (44331421213), we get a palindrome (75543834557).

The spelling of 31212413344 in words is "thirty-one billion, two hundred twelve million, four hundred thirteen thousand, three hundred forty-four".