212412155 has 16 divisors (see below), whose sum is σ = 265036800. Its totient is φ = 163248480.

The previous prime is 212412149. The next prime is 212412163. The reversal of 212412155 is 551214212.

It is not a de Polignac number, because 212412155 - 2⁶ = 212412091 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212412155.

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, 16616 + ... + 26474.

It is an arithmetic number, because the mean of its divisors is an integer number (16564800).

Almost surely, 2^212412155 is an apocalyptic number.

212412155 is a deficient number, since it is larger than the sum of its proper divisors (52624645).

212412155 is a wasteful number, since it uses less digits than its factorization.

212412155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10034.

The product of its digits is 800, while the sum is 23.

The square root of 212412155 is about 14574.3663670158. The cubic root of 212412155 is about 596.6593559785.

Adding to 212412155 its reverse (551214212), we get a palindrome (763626367).

The spelling of 212412155 in words is "two hundred twelve million, four hundred twelve thousand, one hundred fifty-five".