397152211 has 4 divisors (see below), whose sum is σ = 398003112. Its totient is φ = 396301312.

The previous prime is 397152179. The next prime is 397152227. The reversal of 397152211 is 112251793.

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

It is a cyclic number.

It is not a de Polignac number, because 397152211 - 2⁵ = 397152179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (397152311) 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, 424750 + ... + 425683.

It is an arithmetic number, because the mean of its divisors is an integer number (99500778).

Almost surely, 2^397152211 is an apocalyptic number.

397152211 is a deficient number, since it is larger than the sum of its proper divisors (850901).

397152211 is an equidigital number, since it uses as much as digits as its factorization.

397152211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 850900.

The product of its digits is 3780, while the sum is 31.

The square root of 397152211 is about 19928.6781046812. The cubic root of 397152211 is about 735.0535762387.

The spelling of 397152211 in words is "three hundred ninety-seven million, one hundred fifty-two thousand, two hundred eleven".