215447290272 has 72 divisors (see below), whose sum is σ = 648718142436. Its totient is φ = 67591305216.

The previous prime is 215447290249. The next prime is 215447290309. The reversal of 215447290272 is 272092744512.

215447290272 is a `hidden beast` number, since 2 + 1 + 54 + 47 + 290 + 272 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 163665557136 + 51781733136 = 404556^2 + 227556^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21997483 + ... + 22007274.

Almost surely, 2^215447290272 is an apocalyptic number.

It is an amenable number.

215447290272 is an abundant number, since it is smaller than the sum of its proper divisors (433270852164).

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

215447290272 is a wasteful number, since it uses less digits than its factorization.

215447290272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44004790 (or 44004779 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 45.

The spelling of 215447290272 in words is "two hundred fifteen billion, four hundred forty-seven million, two hundred ninety thousand, two hundred seventy-two".