213205955 has 8 divisors (see below), whose sum is σ = 256031952. Its totient is φ = 170441568.

The previous prime is 213205943. The next prime is 213205957. The reversal of 213205955 is 559502312.

213205955 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 213205955 - 2⁴ = 213205939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213205957) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7409 + ... + 21938.

It is an arithmetic number, because the mean of its divisors is an integer number (32003994).

Almost surely, 2^213205955 is an apocalyptic number.

213205955 is a deficient number, since it is larger than the sum of its proper divisors (42825997).

213205955 is a wasteful number, since it uses less digits than its factorization.

213205955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30805.

The product of its (nonzero) digits is 13500, while the sum is 32.

The square root of 213205955 is about 14601.5737165553. The cubic root of 213205955 is about 597.4016854748.

The spelling of 213205955 in words is "two hundred thirteen million, two hundred five thousand, nine hundred fifty-five".