72221061 has 16 divisors (see below), whose sum is σ = 105205248. Its totient is φ = 43705200.

The previous prime is 72221053. The next prime is 72221063. The reversal of 72221061 is 16012227.

It is not a de Polignac number, because 72221061 - 2³ = 72221053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72221063) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30096 + ... + 32406.

It is an arithmetic number, because the mean of its divisors is an integer number (6575328).

Almost surely, 2^72221061 is an apocalyptic number.

It is an amenable number.

72221061 is a deficient number, since it is larger than the sum of its proper divisors (32984187).

72221061 is a wasteful number, since it uses less digits than its factorization.

72221061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3272.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 72221061 is about 8498.2975353891. The cubic root of 72221061 is about 416.4420938805.

Adding to 72221061 its reverse (16012227), we get a palindrome (88233288).

The spelling of 72221061 in words is "seventy-two million, two hundred twenty-one thousand, sixty-one".