72229547 has 8 divisors (see below), whose sum is σ = 78021216. Its totient is φ = 66471552.

The previous prime is 72229541. The next prime is 72229561. The reversal of 72229547 is 74592227.

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

It is a cyclic number.

It is not a de Polignac number, because 72229547 - 2⁶ = 72229483 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72229547.

It is not an unprimeable number, because it can be changed into a prime (72229541) 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, 3863 + ... + 12624.

It is an arithmetic number, because the mean of its divisors is an integer number (9752652).

Almost surely, 2^72229547 is an apocalyptic number.

72229547 is a deficient number, since it is larger than the sum of its proper divisors (5791669).

72229547 is a wasteful number, since it uses less digits than its factorization.

72229547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16837.

The product of its digits is 70560, while the sum is 38.

The square root of 72229547 is about 8498.7967971943. The cubic root of 72229547 is about 416.4584039390.

The spelling of 72229547 in words is "seventy-two million, two hundred twenty-nine thousand, five hundred forty-seven".