1215225512 has 16 divisors (see below), whose sum is σ = 2357118900. Its totient is φ = 586660480.

The previous prime is 1215225511. The next prime is 1215225551. The reversal of 1215225512 is 2155225121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1204506436 + 10719076 = 34706^2 + 3274^2 .

It is not an unprimeable number, because it can be changed into a prime (1215225511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2618789 + ... + 2619252.

Almost surely, 2^1215225512 is an apocalyptic number.

It is an amenable number.

1215225512 is a deficient number, since it is larger than the sum of its proper divisors (1141893388).

1215225512 is a wasteful number, since it uses less digits than its factorization.

1215225512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5238076 (or 5238072 counting only the distinct ones).

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

The square root of 1215225512 is about 34860.0847962250. The cubic root of 1215225512 is about 1067.1340055447.

The spelling of 1215225512 in words is "one billion, two hundred fifteen million, two hundred twenty-five thousand, five hundred twelve".