212133555 has 12 divisors (see below), whose sum is σ = 367698240. Its totient is φ = 113137872.

The previous prime is 212133503. The next prime is 212133563. The reversal of 212133555 is 555331212.

It is a happy number.

It is not a de Polignac number, because 212133555 - 2¹⁶ = 212068019 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2356995 + ... + 2357084.

It is an arithmetic number, because the mean of its divisors is an integer number (30641520).

Almost surely, 2^212133555 is an apocalyptic number.

212133555 is a deficient number, since it is larger than the sum of its proper divisors (155564685).

212133555 is a wasteful number, since it uses less digits than its factorization.

212133555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4714090 (or 4714087 counting only the distinct ones).

The product of its digits is 4500, while the sum is 27.

The square root of 212133555 is about 14564.8053540032. The cubic root of 212133555 is about 596.3983821733.

Adding to 212133555 its reverse (555331212), we get a palindrome (767464767).

The spelling of 212133555 in words is "two hundred twelve million, one hundred thirty-three thousand, five hundred fifty-five".