72515229 has 16 divisors (see below), whose sum is σ = 102220800. Its totient is φ = 45598896.

The previous prime is 72515221. The next prime is 72515237. The reversal of 72515229 is 92251527.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (72515221) and next prime (72515237).

It is not a de Polignac number, because 72515229 - 2³ = 72515221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72515229.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72515221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10962 + ... + 16284.

It is an arithmetic number, because the mean of its divisors is an integer number (6388800).

Almost surely, 2^72515229 is an apocalyptic number.

It is an amenable number.

72515229 is a deficient number, since it is larger than the sum of its proper divisors (29705571).

72515229 is a wasteful number, since it uses less digits than its factorization.

72515229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5584.

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

The square root of 72515229 is about 8515.5874136785. The cubic root of 72515229 is about 417.0067398229.

The spelling of 72515229 in words is "seventy-two million, five hundred fifteen thousand, two hundred twenty-nine".