997228201 has 4 divisors (see below), whose sum is σ = 1012112272. Its totient is φ = 982344132.

The previous prime is 997228171. The next prime is 997228213. The reversal of 997228201 is 102822799.

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 997228201 - 2⁹ = 997227689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (997228291) 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, 7441935 + ... + 7442068.

It is an arithmetic number, because the mean of its divisors is an integer number (253028068).

Almost surely, 2^997228201 is an apocalyptic number.

It is an amenable number.

997228201 is a deficient number, since it is larger than the sum of its proper divisors (14884071).

997228201 is a wasteful number, since it uses less digits than its factorization.

997228201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14884070.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 997228201 is about 31578.9202000322. The cubic root of 997228201 is about 999.0752120308.

The spelling of 997228201 in words is "nine hundred ninety-seven million, two hundred twenty-eight thousand, two hundred one".