1215409152 has 198 divisors, whose sum is σ = 3536798412. Its totient is φ = 370999296.

The previous prime is 1215409121. The next prime is 1215409183. The reversal of 1215409152 is 2519045121.

It is an interprime number because it is at equal distance from previous prime (1215409121) and next prime (1215409183).

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 32848878 + ... + 32848914.

Almost surely, 2^1215409152 is an apocalyptic number.

1215409152 is a gapful number since it is divisible by the number (12) 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 1215409152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1768399206).

1215409152 is an abundant number, since it is smaller than the sum of its proper divisors (2321389260).

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

1215409152 is an equidigital number, since it uses as much as digits as its factorization.

1215409152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131 (or 59 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 30.

The square root of 1215409152 is about 34862.7186547464. The cubic root of 1215409152 is about 1067.1877565060.

The spelling of 1215409152 in words is "one billion, two hundred fifteen million, four hundred nine thousand, one hundred fifty-two".