213284397 has 8 divisors (see below), whose sum is σ = 301107456. Its totient is φ = 133825472.

The previous prime is 213284377. The next prime is 213284441. The reversal of 213284397 is 793482312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 213284397 - 2¹⁵ = 213251629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213284377) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2090973 + ... + 2091074.

It is an arithmetic number, because the mean of its divisors is an integer number (37638432).

Almost surely, 2^213284397 is an apocalyptic number.

It is an amenable number.

213284397 is a deficient number, since it is larger than the sum of its proper divisors (87823059).

213284397 is a wasteful number, since it uses less digits than its factorization.

213284397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4182067.

The product of its digits is 72576, while the sum is 39.

The square root of 213284397 is about 14604.2595498711. The cubic root of 213284397 is about 597.4749411478.

The spelling of 213284397 in words is "two hundred thirteen million, two hundred eighty-four thousand, three hundred ninety-seven".