213020166 has 24 divisors (see below), whose sum is σ = 452579400. Its totient is φ = 66829312.

The previous prime is 213020161. The next prime is 213020231. The reversal of 213020166 is 661020312.

It is a happy number.

It is a super-2 number, since 2×213020166² = 90755182245335112, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213020161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59691 + ... + 63158.

It is an arithmetic number, because the mean of its divisors is an integer number (18857475).

Almost surely, 2^213020166 is an apocalyptic number.

213020166 is an abundant number, since it is smaller than the sum of its proper divisors (239559234).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213020166 is a wasteful number, since it uses less digits than its factorization.

213020166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122888 (or 122871 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 213020166 is about 14595.2103787510. The cubic root of 213020166 is about 597.2281085271.

Adding to 213020166 its reverse (661020312), we get a palindrome (874040478).

The spelling of 213020166 in words is "two hundred thirteen million, twenty thousand, one hundred sixty-six".