221301197 has 4 divisors (see below), whose sum is σ = 238324380. Its totient is φ = 204278016.

The previous prime is 221301191. The next prime is 221301203. The reversal of 221301197 is 791103122.

221301197 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (221301191) and next prime (221301203).

It can be written as a sum of positive squares in 2 ways, for example, as 16410601 + 204890596 = 4051^2 + 14314^2 .

It is a cyclic number.

It is not a de Polignac number, because 221301197 - 2¹⁴ = 221284813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221301191) 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, 8511572 + ... + 8511597.

It is an arithmetic number, because the mean of its divisors is an integer number (59581095).

Almost surely, 2^221301197 is an apocalyptic number.

It is an amenable number.

221301197 is a deficient number, since it is larger than the sum of its proper divisors (17023183).

221301197 is a wasteful number, since it uses less digits than its factorization.

221301197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17023182.

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 221301197 is about 14876.1956494260. The cubic root of 221301197 is about 604.8688985787.

The spelling of 221301197 in words is "two hundred twenty-one million, three hundred one thousand, one hundred ninety-seven".