72281163 has 8 divisors (see below), whose sum is σ = 96414208. Its totient is φ = 48167784.

The previous prime is 72281101. The next prime is 72281173. The reversal of 72281163 is 36118227.

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

It is not a de Polignac number, because 72281163 - 2¹² = 72277067 is a prime.

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 72281163.

It is not an unprimeable number, because it can be changed into a prime (72281173) 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, 11406 + ... + 16572.

It is an arithmetic number, because the mean of its divisors is an integer number (12051776).

Almost surely, 2^72281163 is an apocalyptic number.

72281163 is a deficient number, since it is larger than the sum of its proper divisors (24133045).

72281163 is a wasteful number, since it uses less digits than its factorization.

72281163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9833.

The product of its digits is 4032, while the sum is 30.

The square root of 72281163 is about 8501.8329200238. The cubic root of 72281163 is about 416.5575821817.

The spelling of 72281163 in words is "seventy-two million, two hundred eighty-one thousand, one hundred sixty-three".