213166947 has 16 divisors (see below), whose sum is σ = 341922560. Its totient is φ = 115398432.

The previous prime is 213166939. The next prime is 213166981. The reversal of 213166947 is 749661312.

It is not a de Polignac number, because 213166947 - 2³ = 213166939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213166937) 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, 266728 + ... + 267525.

It is an arithmetic number, because the mean of its divisors is an integer number (21370160).

Almost surely, 2^213166947 is an apocalyptic number.

213166947 is a deficient number, since it is larger than the sum of its proper divisors (128755613).

213166947 is a wasteful number, since it uses less digits than its factorization.

213166947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534282.

The product of its digits is 54432, while the sum is 39.

The square root of 213166947 is about 14600.2379090205. The cubic root of 213166947 is about 597.3652498660.

The spelling of 213166947 in words is "two hundred thirteen million, one hundred sixty-six thousand, nine hundred forty-seven".