72221827 has 4 divisors (see below), whose sum is σ = 72305056. Its totient is φ = 72138600.

The previous prime is 72221813. The next prime is 72221833. The reversal of 72221827 is 72812227.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72221827 - 2¹⁵ = 72189059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72221837) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40299 + ... + 42052.

It is an arithmetic number, because the mean of its divisors is an integer number (18076264).

Almost surely, 2^72221827 is an apocalyptic number.

72221827 is a deficient number, since it is larger than the sum of its proper divisors (83229).

72221827 is an equidigital number, since it uses as much as digits as its factorization.

72221827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83228.

The product of its digits is 6272, while the sum is 31.

The square root of 72221827 is about 8498.3426031197. The cubic root of 72221827 is about 416.4435661819.

The spelling of 72221827 in words is "seventy-two million, two hundred twenty-one thousand, eight hundred twenty-seven".