72247547 has 8 divisors (see below), whose sum is σ = 72864000. Its totient is φ = 71634024.

The previous prime is 72247543. The next prime is 72247559. The reversal of 72247547 is 74574227.

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 72247547 - 2² = 72247543 is a prime.

It is a super-3 number, since 3×72247547³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72247547.

It is not an unprimeable number, because it can be changed into a prime (72247543) 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, 86948 + ... + 87774.

It is an arithmetic number, because the mean of its divisors is an integer number (9108000).

Almost surely, 2^72247547 is an apocalyptic number.

72247547 is a deficient number, since it is larger than the sum of its proper divisors (616453).

72247547 is a wasteful number, since it uses less digits than its factorization.

72247547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1465.

The product of its digits is 109760, while the sum is 38.

The square root of 72247547 is about 8499.8557046576. The cubic root of 72247547 is about 416.4929956399.

The spelling of 72247547 in words is "seventy-two million, two hundred forty-seven thousand, five hundred forty-seven".