1226513316 has 72 divisors (see below), whose sum is σ = 3400016256. Its totient is φ = 342968640.

The previous prime is 1226513311. The next prime is 1226513329. The reversal of 1226513316 is 6133156221.

It is not an unprimeable number, because it can be changed into a prime (1226513311) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5446 + ... + 49826.

It is an arithmetic number, because the mean of its divisors is an integer number (47222448).

Almost surely, 2^1226513316 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1226513316, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1700008128).

1226513316 is an abundant number, since it is smaller than the sum of its proper divisors (2173502940).

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

1226513316 is a wasteful number, since it uses less digits than its factorization.

1226513316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44449 (or 44440 counting only the distinct ones).

The product of its digits is 6480, while the sum is 30.

The square root of 1226513316 is about 35021.6121273707. The cubic root of 1226513316 is about 1070.4279058316.

Adding to 1226513316 its reverse (6133156221), we get a palindrome (7359669537).

The spelling of 1226513316 in words is "one billion, two hundred twenty-six million, five hundred thirteen thousand, three hundred sixteen".