213550166 has 4 divisors (see below), whose sum is σ = 320325252. Its totient is φ = 106775082.

The previous prime is 213550163. The next prime is 213550189. The reversal of 213550166 is 661055312.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213550163) 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 as a sum of consecutive naturals, namely, 53387540 + ... + 53387543.

It is an arithmetic number, because the mean of its divisors is an integer number (80081313).

Almost surely, 2^213550166 is an apocalyptic number.

213550166 is a deficient number, since it is larger than the sum of its proper divisors (106775086).

213550166 is a wasteful number, since it uses less digits than its factorization.

213550166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106775085.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 213550166 is about 14613.3557405546. The cubic root of 213550166 is about 597.7230049387.

The spelling of 213550166 in words is "two hundred thirteen million, five hundred fifty thousand, one hundred sixty-six".