213810855 has 16 divisors (see below), whose sum is σ = 342641664. Its totient is φ = 113851040.

The previous prime is 213810833. The next prime is 213810889. The reversal of 213810855 is 558018312.

It is a happy number.

It is not a de Polignac number, because 213810855 - 2⁶ = 213810791 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 15 ways as a sum of consecutive naturals, for example, 1311 + ... + 20720.

It is an arithmetic number, because the mean of its divisors is an integer number (21415104).

Almost surely, 2^213810855 is an apocalyptic number.

213810855 is a deficient number, since it is larger than the sum of its proper divisors (128830809).

213810855 is a wasteful number, since it uses less digits than its factorization.

213810855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22686.

The product of its (nonzero) digits is 9600, while the sum is 33.

The square root of 213810855 is about 14622.2725661916. The cubic root of 213810855 is about 597.9661272820.

The spelling of 213810855 in words is "two hundred thirteen million, eight hundred ten thousand, eight hundred fifty-five".