72221562 has 48 divisors (see below), whose sum is σ = 179687040. Its totient is φ = 20536416.

The previous prime is 72221561. The next prime is 72221647. The reversal of 72221562 is 26512227.

It is not an unprimeable number, because it can be changed into a prime (72221561) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27603 + ... + 30105.

It is an arithmetic number, because the mean of its divisors is an integer number (3743480).

Almost surely, 2^72221562 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72221562, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89843520).

72221562 is an abundant number, since it is smaller than the sum of its proper divisors (107465478).

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

72221562 is a wasteful number, since it uses less digits than its factorization.

72221562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2747 (or 2744 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 72221562 is about 8498.3270118300. The cubic root of 72221562 is about 416.4430568360.

Adding to 72221562 its reverse (26512227), we get a palindrome (98733789).

The spelling of 72221562 in words is "seventy-two million, two hundred twenty-one thousand, five hundred sixty-two".