1312622220 has 192 divisors, whose sum is σ = 4761953280. Its totient is φ = 262351872.

The previous prime is 1312622219. The next prime is 1312622237. The reversal of 1312622220 is 222262131.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 97414 + ... + 110066.

It is an arithmetic number, because the mean of its divisors is an integer number (24801840).

Almost surely, 2^1312622220 is an apocalyptic number.

1312622220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1312622220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2380976640).

1312622220 is an abundant number, since it is smaller than the sum of its proper divisors (3449331060).

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

1312622220 is a wasteful number, since it uses less digits than its factorization.

1312622220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12704 (or 12702 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1312622220 is about 36230.1286224601. The cubic root of 1312622220 is about 1094.9137689857.

Adding to 1312622220 its reverse (222262131), we get a palindrome (1534884351).

The spelling of 1312622220 in words is "one billion, three hundred twelve million, six hundred twenty-two thousand, two hundred twenty".