397224271 has 4 divisors (see below), whose sum is σ = 397311552. Its totient is φ = 397136992.

The previous prime is 397224257. The next prime is 397224313. The reversal of 397224271 is 172422793.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 172422793 = 79 ⋅2182567.

It is a cyclic number.

It is not a de Polignac number, because 397224271 - 2¹⁵ = 397191503 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 397224271.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397224211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36415 + ... + 46048.

It is an arithmetic number, because the mean of its divisors is an integer number (99327888).

Almost surely, 2^397224271 is an apocalyptic number.

397224271 is a deficient number, since it is larger than the sum of its proper divisors (87281).

397224271 is an equidigital number, since it uses as much as digits as its factorization.

397224271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87280.

The product of its digits is 42336, while the sum is 37.

The square root of 397224271 is about 19930.4859699908. The cubic root of 397224271 is about 735.0980300241.

The spelling of 397224271 in words is "three hundred ninety-seven million, two hundred twenty-four thousand, two hundred seventy-one".