72215529 has 8 divisors (see below), whose sum is σ = 96417600. Its totient is φ = 48078576.

The previous prime is 72215519. The next prime is 72215537. The reversal of 72215529 is 92551227.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72215529 - 2⁴ = 72215513 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72215529.

It is not an unprimeable number, because it can be changed into a prime (72215509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13629 + ... + 18170.

It is an arithmetic number, because the mean of its divisors is an integer number (12052200).

Almost surely, 2^72215529 is an apocalyptic number.

It is an amenable number.

72215529 is a deficient number, since it is larger than the sum of its proper divisors (24202071).

72215529 is a wasteful number, since it uses less digits than its factorization.

72215529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32559.

The product of its digits is 12600, while the sum is 33.

The square root of 72215529 is about 8497.9720522016. The cubic root of 72215529 is about 416.4314607103.

The spelling of 72215529 in words is "seventy-two million, two hundred fifteen thousand, five hundred twenty-nine".