1215150244 has 144 divisors (see below), whose sum is σ = 2883865600. Its totient is φ = 437088960.

The previous prime is 1215150217. The next prime is 1215150247. The reversal of 1215150244 is 4420515121.

It is not an unprimeable number, because it can be changed into a prime (1215150247) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2767777 + ... + 2768215.

Almost surely, 2^1215150244 is an apocalyptic number.

1215150244 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 1215150244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1441932800).

1215150244 is an abundant number, since it is smaller than the sum of its proper divisors (1668715356).

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

1215150244 is a wasteful number, since it uses less digits than its factorization.

1215150244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534 (or 521 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 1215150244 is about 34859.0052066894. The cubic root of 1215150244 is about 1067.1119732278. Note that the first 3 decimals are identical.

Adding to 1215150244 its reverse (4420515121), we get a palindrome (5635665365).

The spelling of 1215150244 in words is "one billion, two hundred fifteen million, one hundred fifty thousand, two hundred forty-four".