213244297 has 4 divisors (see below), whose sum is σ = 243707776. Its totient is φ = 182780820.

The previous prime is 213244237. The next prime is 213244313. The reversal of 213244297 is 792442312.

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 213244297 - 2²⁷ = 79026569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213244237) 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, 15231729 + ... + 15231742.

It is an arithmetic number, because the mean of its divisors is an integer number (60926944).

Almost surely, 2^213244297 is an apocalyptic number.

It is an amenable number.

213244297 is a deficient number, since it is larger than the sum of its proper divisors (30463479).

213244297 is an equidigital number, since it uses as much as digits as its factorization.

213244297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30463478.

The product of its digits is 24192, while the sum is 34.

The square root of 213244297 is about 14602.8865982038. The cubic root of 213244297 is about 597.4374946723.

The spelling of 213244297 in words is "two hundred thirteen million, two hundred forty-four thousand, two hundred ninety-seven".