72222097 has 4 divisors (see below), whose sum is σ = 76023280. Its totient is φ = 68420916.

The previous prime is 72222091. The next prime is 72222107. The reversal of 72222097 is 79022227.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 72222097 - 2³ = 72222089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72222091) 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, 1900563 + ... + 1900600.

It is an arithmetic number, because the mean of its divisors is an integer number (19005820).

Almost surely, 2^72222097 is an apocalyptic number.

It is an amenable number.

72222097 is a deficient number, since it is larger than the sum of its proper divisors (3801183).

72222097 is a wasteful number, since it uses less digits than its factorization.

72222097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3801182.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 72222097 is about 8498.3584885553. The cubic root of 72222097 is about 416.4440851369. Note that the first 3 decimals are identical.

The spelling of 72222097 in words is "seventy-two million, two hundred twenty-two thousand, ninety-seven".