1312031222 has 16 divisors (see below), whose sum is σ = 2015748240. Its totient is φ = 640144512.

The previous prime is 1312031213. The next prime is 1312031257. The reversal of 1312031222 is 2221302131.

It is a super-3 number, since 3×1312031222³ (a number of 28 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1312031222.

It is a congruent number.

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, 90338 + ... + 103850.

It is an arithmetic number, because the mean of its divisors is an integer number (125984265).

Almost surely, 2^1312031222 is an apocalyptic number.

1312031222 is a deficient number, since it is larger than the sum of its proper divisors (703717018).

1312031222 is a wasteful number, since it uses less digits than its factorization.

1312031222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14687.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1312031222 is about 36221.9715366240. The cubic root of 1312031222 is about 1094.7494188327.

Adding to 1312031222 its reverse (2221302131), we get a palindrome (3533333353).

The spelling of 1312031222 in words is "one billion, three hundred twelve million, thirty-one thousand, two hundred twenty-two".