27220197 has 16 divisors (see below), whose sum is σ = 37461312. Its totient is φ = 17568000.

The previous prime is 27220169. The next prime is 27220199. The reversal of 27220197 is 79102272.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-27220197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27220199) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27373 + ... + 28349.

It is an arithmetic number, because the mean of its divisors is an integer number (2341332).

Almost surely, 2^27220197 is an apocalyptic number.

It is an amenable number.

27220197 is a deficient number, since it is larger than the sum of its proper divisors (10241115).

27220197 is a wasteful number, since it uses less digits than its factorization.

27220197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1268.

The product of its (nonzero) digits is 3528, while the sum is 30.

The square root of 27220197 is about 5217.2978638372. The cubic root of 27220197 is about 300.8133373927.

The spelling of 27220197 in words is "twenty-seven million, two hundred twenty thousand, one hundred ninety-seven".