1215255162 has 64 divisors (see below), whose sum is σ = 2799475200. Its totient is φ = 347820480.

The previous prime is 1215255137. The next prime is 1215255191. The reversal of 1215255162 is 2615525121.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 473988 + ... + 476544.

It is an arithmetic number, because the mean of its divisors is an integer number (43741800).

Almost surely, 2^1215255162 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1215255162, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1399737600).

1215255162 is an abundant number, since it is smaller than the sum of its proper divisors (1584220038).

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

1215255162 is a wasteful number, since it uses less digits than its factorization.

1215255162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2971.

The product of its digits is 6000, while the sum is 30.

The square root of 1215255162 is about 34860.5100651152. The cubic root of 1215255162 is about 1067.1426843909.

The spelling of 1215255162 in words is "one billion, two hundred fifteen million, two hundred fifty-five thousand, one hundred sixty-two".