1215216133 has 8 divisors (see below), whose sum is σ = 1219080960. Its totient is φ = 1211358720.

The previous prime is 1215216113. The next prime is 1215216199. The reversal of 1215216133 is 3316125121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1215216133 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1215216098 and 1215216107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215216113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 549516 + ... + 551722.

It is an arithmetic number, because the mean of its divisors is an integer number (152385120).

Almost surely, 2^1215216133 is an apocalyptic number.

It is an amenable number.

1215216133 is a deficient number, since it is larger than the sum of its proper divisors (3864827).

1215216133 is an equidigital number, since it uses as much as digits as its factorization.

1215216133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3707.

The product of its digits is 1080, while the sum is 25.

The square root of 1215216133 is about 34859.9502724832. The cubic root of 1215216133 is about 1067.1312601899.

The spelling of 1215216133 in words is "one billion, two hundred fifteen million, two hundred sixteen thousand, one hundred thirty-three".