213115055 has 16 divisors (see below), whose sum is σ = 265014720. Its totient is φ = 164328192.

The previous prime is 213115051. The next prime is 213115087. The reversal of 213115055 is 550511312.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 213115055 - 2² = 213115051 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 213115055.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213115051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127787 + ... + 129443.

It is an arithmetic number, because the mean of its divisors is an integer number (16563420).

Almost surely, 2^213115055 is an apocalyptic number.

213115055 is a deficient number, since it is larger than the sum of its proper divisors (51899665).

213115055 is a wasteful number, since it uses less digits than its factorization.

213115055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2578.

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 213115055 is about 14598.4607065266. The cubic root of 213115055 is about 597.3167730052.

Adding to 213115055 its reverse (550511312), we get a palindrome (763626367).

The spelling of 213115055 in words is "two hundred thirteen million, one hundred fifteen thousand, fifty-five".