213307447 has 4 divisors (see below), whose sum is σ = 213385320. Its totient is φ = 213229576.

The previous prime is 213307439. The next prime is 213307459. The reversal of 213307447 is 744703312.

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 213307447 - 2³ = 213307439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213307417) 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, 34672 + ... + 40357.

It is an arithmetic number, because the mean of its divisors is an integer number (53346330).

Almost surely, 2^213307447 is an apocalyptic number.

213307447 is a deficient number, since it is larger than the sum of its proper divisors (77873).

213307447 is an equidigital number, since it uses as much as digits as its factorization.

213307447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77872.

The product of its (nonzero) digits is 14112, while the sum is 31.

The square root of 213307447 is about 14605.0486818771. The cubic root of 213307447 is about 597.4964637431.

The spelling of 213307447 in words is "two hundred thirteen million, three hundred seven thousand, four hundred forty-seven".