212010155 has 16 divisors (see below), whose sum is σ = 300784320. Its totient is φ = 140364672.

The previous prime is 212010133. The next prime is 212010157. The reversal of 212010155 is 551010212.

It is a de Polignac number, because none of the positive numbers 2^k-212010155 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212010157) 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, 103424 + ... + 105453.

It is an arithmetic number, because the mean of its divisors is an integer number (18799020).

Almost surely, 2^212010155 is an apocalyptic number.

212010155 is a deficient number, since it is larger than the sum of its proper divisors (88774165).

212010155 is a wasteful number, since it uses less digits than its factorization.

212010155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208918.

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 212010155 is about 14560.5684985168. The cubic root of 212010155 is about 596.2827163052.

Adding to 212010155 its reverse (551010212), we get a palindrome (763020367).

The spelling of 212010155 in words is "two hundred twelve million, ten thousand, one hundred fifty-five".