1312224312 has 96 divisors (see below), whose sum is σ = 3833341200. Its totient is φ = 373234176.

The previous prime is 1312224301. The next prime is 1312224317. The reversal of 1312224312 is 2134222131.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312224317) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 271614 + ... + 276402.

Almost surely, 2^1312224312 is an apocalyptic number.

1312224312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1312224312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1916670600).

1312224312 is an abundant number, since it is smaller than the sum of its proper divisors (2521116888).

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

1312224312 is a wasteful number, since it uses less digits than its factorization.

1312224312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5045 (or 5034 counting only the distinct ones).

The product of its digits is 576, while the sum is 21.

The square root of 1312224312 is about 36224.6368097735. The cubic root of 1312224312 is about 1094.8031205010.

Adding to 1312224312 its reverse (2134222131), we get a palindrome (3446446443).

The spelling of 1312224312 in words is "one billion, three hundred twelve million, two hundred twenty-four thousand, three hundred twelve".