1316237220 has 72 divisors (see below), whose sum is σ = 4016585664. Its totient is φ = 348886848.

The previous prime is 1316237191. The next prime is 1316237317. The reversal of 1316237220 is 227326131.

1316237220 is a `hidden beast` number, since 1 + 31 + 623 + 7 + 2 + 2 + 0 = 666.

1316237220 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8167 + ... + 51953.

It is an arithmetic number, because the mean of its divisors is an integer number (55785912).

Almost surely, 2^1316237220 is an apocalyptic number.

1316237220 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 1316237220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2008292832).

1316237220 is an abundant number, since it is smaller than the sum of its proper divisors (2700348444).

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

1316237220 is a wasteful number, since it uses less digits than its factorization.

1316237220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43969 (or 43964 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 1316237220 is about 36279.9837375928. The cubic root of 1316237220 is about 1095.9179891838.

The spelling of 1316237220 in words is "one billion, three hundred sixteen million, two hundred thirty-seven thousand, two hundred twenty".