72223530 has 32 divisors (see below), whose sum is σ = 173916288. Its totient is φ = 19195200.

The previous prime is 72223517. The next prime is 72223553. The reversal of 72223530 is 3532227.

It is a self number, because there is not a number n which added to its sum of digits gives 72223530.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5460 + ... + 13200.

It is an arithmetic number, because the mean of its divisors is an integer number (5434884).

Almost surely, 2^72223530 is an apocalyptic number.

72223530 is an abundant number, since it is smaller than the sum of its proper divisors (101692758).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72223530 is a wasteful number, since it uses less digits than its factorization.

72223530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8062.

The product of its (nonzero) digits is 2520, while the sum is 24.

The square root of 72223530 is about 8498.4427985367. The cubic root of 72223530 is about 416.4468394205.

Adding to 72223530 its reverse (3532227), we get a palindrome (75755757).

The spelling of 72223530 in words is "seventy-two million, two hundred twenty-three thousand, five hundred thirty".