1215225152 has 28 divisors (see below), whose sum is σ = 2416797300. Its totient is φ = 606268416.

The previous prime is 1215225149. The next prime is 1215225173. The reversal of 1215225152 is 2515225121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 493550656 + 721674496 = 22216^2 + 26864^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8474 + ... + 50022.

Almost surely, 2^1215225152 is an apocalyptic number.

It is an amenable number.

1215225152 is a deficient number, since it is larger than the sum of its proper divisors (1201572148).

1215225152 is an equidigital number, since it uses as much as digits as its factorization.

1215225152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42018 (or 42008 counting only the distinct ones).

The product of its digits is 2000, while the sum is 26.

The square root of 1215225152 is about 34860.0796327260. The cubic root of 1215225152 is about 1067.1339001683.

The spelling of 1215225152 in words is "one billion, two hundred fifteen million, two hundred twenty-five thousand, one hundred fifty-two".