1312132220 has 48 divisors (see below), whose sum is σ = 3151249920. Its totient is φ = 449569344.

The previous prime is 1312132219. The next prime is 1312132271. The reversal of 1312132220 is 222312131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 325457 + ... + 329463.

It is an arithmetic number, because the mean of its divisors is an integer number (65651040).

Almost surely, 2^1312132220 is an apocalyptic number.

1312132220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1312132220 is an abundant number, since it is smaller than the sum of its proper divisors (1839117700).

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

1312132220 is a wasteful number, since it uses less digits than its factorization.

1312132220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6362 (or 6360 counting only the distinct ones).

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

The square root of 1312132220 is about 36223.3656636155. The cubic root of 1312132220 is about 1094.7775087803. Note that the first 3 decimals are identical.

Adding to 1312132220 its reverse (222312131), we get a palindrome (1534444351).

The spelling of 1312132220 in words is "one billion, three hundred twelve million, one hundred thirty-two thousand, two hundred twenty".