1312223450 has 24 divisors (see below), whose sum is σ = 2500269660. Its totient is φ = 512086400.

The previous prime is 1312223447. The next prime is 1312223453. The reversal of 1312223450 is 543222131.

It is an interprime number because it is at equal distance from previous prime (1312223447) and next prime (1312223453).

It can be written as a sum of positive squares in 6 ways, for example, as 501625609 + 810597841 = 22397^2 + 28471^2 .

It is not an unprimeable number, because it can be changed into a prime (1312223453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 318005 + ... + 322104.

Almost surely, 2^1312223450 is an apocalyptic number.

1312223450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1312223450 is a deficient number, since it is larger than the sum of its proper divisors (1188046210).

1312223450 is a wasteful number, since it uses less digits than its factorization.

1312223450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640162 (or 640157 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 1312223450 is about 36224.6249117917. The cubic root of 1312223450 is about 1094.8028807756.

Adding to 1312223450 its reverse (543222131), we get a palindrome (1855445581).

The spelling of 1312223450 in words is "one billion, three hundred twelve million, two hundred twenty-three thousand, four hundred fifty".