1215250568 has 96 divisors (see below), whose sum is σ = 2795131800. Its totient is φ = 493129728.

The previous prime is 1215250523. The next prime is 1215250573. The reversal of 1215250568 is 8650525121.

It can be written as a sum of positive squares in 4 ways, for example, as 1208396644 + 6853924 = 34762^2 + 2618^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 601496 + ... + 603512.

Almost surely, 2^1215250568 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1215250568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1397565900).

1215250568 is an abundant number, since it is smaller than the sum of its proper divisors (1579881232).

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

1215250568 is a wasteful number, since it uses less digits than its factorization.

1215250568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2119 (or 2108 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 35.

The square root of 1215250568 is about 34860.4441738771. Note that the first 3 decimals coincide. The cubic root of 1215250568 is about 1067.1413396912.

Adding to 1215250568 its reverse (8650525121), we get a palindrome (9865775689).

The spelling of 1215250568 in words is "one billion, two hundred fifteen million, two hundred fifty thousand, five hundred sixty-eight".