72221567 has 8 divisors (see below), whose sum is σ = 78874752. Its totient is φ = 65583000.

The previous prime is 72221561. The next prime is 72221647. The reversal of 72221567 is 76512227.

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 72221567 - 2⁶ = 72221503 is a prime.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 8438 + ... + 14684.

It is an arithmetic number, because the mean of its divisors is an integer number (9859344).

Almost surely, 2^72221567 is an apocalyptic number.

72221567 is a deficient number, since it is larger than the sum of its proper divisors (6653185).

72221567 is a wasteful number, since it uses less digits than its factorization.

72221567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7309.

The product of its digits is 11760, while the sum is 32.

The square root of 72221567 is about 8498.3273060056. The cubic root of 72221567 is about 416.4430664463.

The spelling of 72221567 in words is "seventy-two million, two hundred twenty-one thousand, five hundred sixty-seven".