1312213032 has 48 divisors (see below), whose sum is σ = 3827290740. Its totient is φ = 403757568.

The previous prime is 1312213031. The next prime is 1312213057. The reversal of 1312213032 is 2303122131.

It can be written as a sum of positive squares in 2 ways, for example, as 1265509476 + 46703556 = 35574^2 + 6834^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1312212996 and 1312213014.

It is not an unprimeable number, because it can be changed into a prime (1312213031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 700033 + ... + 701904.

Almost surely, 2^1312213032 is an apocalyptic number.

1312213032 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1312213032 is an abundant number, since it is smaller than the sum of its proper divisors (2515077708).

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

1312213032 is a wasteful number, since it uses less digits than its factorization.

1312213032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1401962 (or 1401955 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1312213032 is about 36224.4811142962. The cubic root of 1312213032 is about 1094.7999834828.

Adding to 1312213032 its reverse (2303122131), we get a palindrome (3615335163).

Subtracting 1312213032 from its reverse (2303122131), we obtain a palindrome (990909099).

The spelling of 1312213032 in words is "one billion, three hundred twelve million, two hundred thirteen thousand, thirty-two".