1312222224 has 40 divisors (see below), whose sum is σ = 3421021120. Its totient is φ = 433392768.

The previous prime is 1312222217. The next prime is 1312222237. The reversal of 1312222224 is 4222222131.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1312222224.

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, 120172 + ... + 130635.

It is an arithmetic number, because the mean of its divisors is an integer number (85525528).

Almost surely, 2^1312222224 is an apocalyptic number.

It is an amenable number.

1312222224 is an abundant number, since it is smaller than the sum of its proper divisors (2108798896).

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

1312222224 is a wasteful number, since it uses less digits than its factorization.

1312222224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250927 (or 250921 counting only the distinct ones).

The product of its digits is 768, while the sum is 21.

The square root of 1312222224 is about 36224.6079895973. The cubic root of 1312222224 is about 1094.8025398202.

Adding to 1312222224 its reverse (4222222131), we get a palindrome (5534444355).

The spelling of 1312222224 in words is "one billion, three hundred twelve million, two hundred twenty-two thousand, two hundred twenty-four".