213655550 has 24 divisors (see below), whose sum is σ = 403919832. Its totient is φ = 84060000.

The previous prime is 213655537. The next prime is 213655571. The reversal of 213655550 is 55556312.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31976 + ... + 38075.

It is an arithmetic number, because the mean of its divisors is an integer number (16829993).

Almost surely, 2^213655550 is an apocalyptic number.

213655550 is a deficient number, since it is larger than the sum of its proper divisors (190264282).

213655550 is a wasteful number, since it uses less digits than its factorization.

213655550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70124 (or 70119 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 32.

The square root of 213655550 is about 14616.9610384649. The cubic root of 213655550 is about 597.8213113984.

The spelling of 213655550 in words is "two hundred thirteen million, six hundred fifty-five thousand, five hundred fifty".