212242555 has 16 divisors (see below), whose sum is σ = 291619584. Its totient is φ = 145265760.

The previous prime is 212242531. The next prime is 212242567. The reversal of 212242555 is 555242212.

212242555 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 212242555 - 2²⁷ = 78024827 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14320 + ... + 25090.

It is an arithmetic number, because the mean of its divisors is an integer number (18226224).

Almost surely, 2^212242555 is an apocalyptic number.

212242555 is a deficient number, since it is larger than the sum of its proper divisors (79377029).

212242555 is a wasteful number, since it uses less digits than its factorization.

212242555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11346.

The product of its digits is 8000, while the sum is 28.

The square root of 212242555 is about 14568.5467703543. The cubic root of 212242555 is about 596.5005132618.

Adding to 212242555 its reverse (555242212), we get a palindrome (767484767).

The spelling of 212242555 in words is "two hundred twelve million, two hundred forty-two thousand, five hundred fifty-five".