213111255 has 32 divisors (see below), whose sum is σ = 395518464. Its totient is φ = 95965056.

The previous prime is 213111229. The next prime is 213111259. The reversal of 213111255 is 552111312.

It is not a de Polignac number, because 213111255 - 2⁶ = 213111191 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213111259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8112 + ... + 22181.

It is an arithmetic number, because the mean of its divisors is an integer number (12359952).

Almost surely, 2^213111255 is an apocalyptic number.

213111255 is a deficient number, since it is larger than the sum of its proper divisors (182407209).

213111255 is a wasteful number, since it uses less digits than its factorization.

213111255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30375.

The product of its digits is 300, while the sum is 21.

The square root of 213111255 is about 14598.3305552382. The cubic root of 213111255 is about 597.3132227833.

Adding to 213111255 its reverse (552111312), we get a palindrome (765222567).

The spelling of 213111255 in words is "two hundred thirteen million, one hundred eleven thousand, two hundred fifty-five".