1213565416 has 32 divisors (see below), whose sum is σ = 2737368000. Its totient is φ = 492725376.

The previous prime is 1213565369. The next prime is 1213565429. The reversal of 1213565416 is 6145653121.

It is a super-2 number, since 2×1213565416² = 2945482037822506112, which contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 569221 + ... + 571348.

It is an arithmetic number, because the mean of its divisors is an integer number (85542750).

Almost surely, 2^1213565416 is an apocalyptic number.

It is an amenable number.

1213565416 is an abundant number, since it is smaller than the sum of its proper divisors (1523802584).

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

1213565416 is a wasteful number, since it uses less digits than its factorization.

1213565416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1140601 (or 1140597 counting only the distinct ones).

The product of its digits is 21600, while the sum is 34.

The square root of 1213565416 is about 34836.2658159568. The cubic root of 1213565416 is about 1066.6478537481.

The spelling of 1213565416 in words is "one billion, two hundred thirteen million, five hundred sixty-five thousand, four hundred sixteen".