72198227 has 2 divisors, whose sum is σ = 72198228. Its totient is φ = 72198226.

The previous prime is 72198223. The next prime is 72198229. The reversal of 72198227 is 72289127.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72198227 - 2² = 72198223 is a prime.

Together with 72198229, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (72198223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36099113 + 36099114.

It is an arithmetic number, because the mean of its divisors is an integer number (36099114).

Almost surely, 2^72198227 is an apocalyptic number.

72198227 is a deficient number, since it is larger than the sum of its proper divisors (1).

72198227 is an equidigital number, since it uses as much as digits as its factorization.

72198227 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28224, while the sum is 38.

The square root of 72198227 is about 8496.9539836344. The cubic root of 72198227 is about 416.3982006774.

The spelling of 72198227 in words is "seventy-two million, one hundred ninety-eight thousand, two hundred twenty-seven".