213199973 has 16 divisors (see below), whose sum is σ = 248956416. Its totient is φ = 178788480.

The previous prime is 213199939. The next prime is 213199993. The reversal of 213199973 is 379991312.

213199973 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 213199973 - 2²⁴ = 196422757 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 (213199913) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 192740 + ... + 193842.

It is an arithmetic number, because the mean of its divisors is an integer number (15559776).

Almost surely, 2^213199973 is an apocalyptic number.

It is an amenable number.

213199973 is a deficient number, since it is larger than the sum of its proper divisors (35756443).

213199973 is a wasteful number, since it uses less digits than its factorization.

213199973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1684.

The product of its digits is 91854, while the sum is 44.

The square root of 213199973 is about 14601.3688741844. The cubic root of 213199973 is about 597.3960982476.

The spelling of 213199973 in words is "two hundred thirteen million, one hundred ninety-nine thousand, nine hundred seventy-three".