1215055506 has 32 divisors (see below), whose sum is σ = 2852334720. Its totient is φ = 337775616.

The previous prime is 1215055489. The next prime is 1215055507. The reversal of 1215055506 is 6055505121.

It is not an unprimeable number, because it can be changed into a prime (1215055507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 389391 + ... + 392498.

It is an arithmetic number, because the mean of its divisors is an integer number (89135460).

Almost surely, 2^1215055506 is an apocalyptic number.

1215055506 is an abundant number, since it is smaller than the sum of its proper divisors (1637279214).

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

1215055506 is a wasteful number, since it uses less digits than its factorization.

1215055506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 781938.

The product of its (nonzero) digits is 7500, while the sum is 30.

The square root of 1215055506 is about 34857.6463060833. The cubic root of 1215055506 is about 1067.0842403934.

The spelling of 1215055506 in words is "one billion, two hundred fifteen million, fifty-five thousand, five hundred six".