1215154064 has 40 divisors (see below), whose sum is σ = 2423490720. Its totient is φ = 589881600.

The previous prime is 1215154021. The next prime is 1215154093. The reversal of 1215154064 is 4604515121.

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, 134027 + ... + 142805.

It is an arithmetic number, because the mean of its divisors is an integer number (60587268).

Almost surely, 2^1215154064 is an apocalyptic number.

It is an amenable number.

1215154064 is a deficient number, since it is larger than the sum of its proper divisors (1208336656).

1215154064 is a wasteful number, since it uses less digits than its factorization.

1215154064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9039 (or 9033 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 1215154064 is about 34859.0599988009. The cubic root of 1215154064 is about 1067.1130914334.

Adding to 1215154064 its reverse (4604515121), we get a palindrome (5819669185).

The spelling of 1215154064 in words is "one billion, two hundred fifteen million, one hundred fifty-four thousand, sixty-four".