72522229 has 8 divisors (see below), whose sum is σ = 79382072. Its totient is φ = 65845440.

The previous prime is 72522227. The next prime is 72522251. The reversal of 72522229 is 92222527.

It can be written as a sum of positive squares in 4 ways, for example, as 2883204 + 69639025 = 1698^2 + 8345^2 .

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 72522229 - 2¹ = 72522227 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72522229.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72522227) 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, 44934 + ... + 46519.

It is an arithmetic number, because the mean of its divisors is an integer number (9922759).

Almost surely, 2^72522229 is an apocalyptic number.

It is an amenable number.

72522229 is a deficient number, since it is larger than the sum of its proper divisors (6859843).

72522229 is a wasteful number, since it uses less digits than its factorization.

72522229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91527.

The product of its digits is 10080, while the sum is 31.

The square root of 72522229 is about 8515.9984147486. The cubic root of 72522229 is about 417.0201574792.

The spelling of 72522229 in words is "seventy-two million, five hundred twenty-two thousand, two hundred twenty-nine".