1215340616 has 32 divisors (see below), whose sum is σ = 2688314880. Its totient is φ = 504057600.

The previous prime is 1215340589. The next prime is 1215340627. The reversal of 1215340616 is 6160435121.

It is a happy number.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 348305 + ... + 351776.

It is an arithmetic number, because the mean of its divisors is an integer number (84009840).

Almost surely, 2^1215340616 is an apocalyptic number.

It is an amenable number.

1215340616 is an abundant number, since it is smaller than the sum of its proper divisors (1472974264).

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

1215340616 is a wasteful number, since it uses less digits than its factorization.

1215340616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700125 (or 700121 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 1215340616 is about 34861.7356997611. The cubic root of 1215340616 is about 1067.1676968262.

Adding to 1215340616 its reverse (6160435121), we get a palindrome (7375775737).

The spelling of 1215340616 in words is "one billion, two hundred fifteen million, three hundred forty thousand, six hundred sixteen".