1215133164 has 216 divisors, whose sum is σ = 3829582848. Its totient is φ = 335573280.

The previous prime is 1215133151. The next prime is 1215133189. The reversal of 1215133164 is 4613315121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1476057 + ... + 1476879.

Almost surely, 2^1215133164 is an apocalyptic number.

1215133164 is a gapful number since it is divisible by the number (14) 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 1215133164, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1914791424).

1215133164 is an abundant number, since it is smaller than the sum of its proper divisors (2614449684).

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

1215133164 is a wasteful number, since it uses less digits than its factorization.

1215133164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 887 (or 866 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 1215133164 is about 34858.7602189177. The cubic root of 1215133164 is about 1067.1069734735.

Adding to 1215133164 its reverse (4613315121), we get a palindrome (5828448285).

The spelling of 1215133164 in words is "one billion, two hundred fifteen million, one hundred thirty-three thousand, one hundred sixty-four".