1215027216 has 160 divisors (see below), whose sum is σ = 3803645440. Its totient is φ = 373714560.

The previous prime is 1215027211. The next prime is 1215027241. The reversal of 1215027216 is 6127205121.

It is a super-2 number, since 2×1215027216² = 2952582271241421312, which contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1215027216.

It is not an unprimeable number, because it can be changed into a prime (1215027211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 453561 + ... + 456231.

It is an arithmetic number, because the mean of its divisors is an integer number (23772784).

Almost surely, 2^1215027216 is an apocalyptic number.

1215027216 is a gapful number since it is divisible by the number (16) 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 1215027216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1901822720).

1215027216 is an abundant number, since it is smaller than the sum of its proper divisors (2588618224).

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

1215027216 is an equidigital number, since it uses as much as digits as its factorization.

1215027216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2713 (or 2689 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 1215027216 is about 34857.2405104019. The cubic root of 1215027216 is about 1067.0759587285.

The spelling of 1215027216 in words is "one billion, two hundred fifteen million, twenty-seven thousand, two hundred sixteen".