72222201 has 24 divisors (see below), whose sum is σ = 106666560. Its totient is φ = 47078496.

The previous prime is 72222193. The next prime is 72222229. The reversal of 72222201 is 10222227.

It is a happy number.

It is not a de Polignac number, because 72222201 - 2³ = 72222193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72222251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 80980 + ... + 81866.

It is an arithmetic number, because the mean of its divisors is an integer number (4444440).

Almost surely, 2^72222201 is an apocalyptic number.

It is an amenable number.

72222201 is a deficient number, since it is larger than the sum of its proper divisors (34444359).

72222201 is a wasteful number, since it uses less digits than its factorization.

72222201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1085 (or 1082 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 72222201 is about 8498.3646073818. The cubic root of 72222201 is about 416.4442850303. Note that the first 3 decimals are identical.

Adding to 72222201 its reverse (10222227), we get a palindrome (82444428).

The spelling of 72222201 in words is "seventy-two million, two hundred twenty-two thousand, two hundred one".