1215502240 has 48 divisors (see below), whose sum is σ = 2878636320. Its totient is φ = 485013760.

The previous prime is 1215502231. The next prime is 1215502243. The reversal of 1215502240 is 422055121.

It is not an unprimeable number, because it can be changed into a prime (1215502243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57975 + ... + 76105.

It is an arithmetic number, because the mean of its divisors is an integer number (59971590).

Almost surely, 2^1215502240 is an apocalyptic number.

1215502240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1215502240 is an abundant number, since it is smaller than the sum of its proper divisors (1663134080).

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

1215502240 is a wasteful number, since it uses less digits than its factorization.

1215502240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18565 (or 18557 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 1215502240 is about 34864.0536943139. The cubic root of 1215502240 is about 1067.2150010591.

Adding to 1215502240 its reverse (422055121), we get a palindrome (1637557361).

The spelling of 1215502240 in words is "one billion, two hundred fifteen million, five hundred two thousand, two hundred forty".