212239155 has 16 divisors (see below), whose sum is σ = 339874560. Its totient is φ = 113096928.

The previous prime is 212239133. The next prime is 212239207. The reversal of 212239155 is 551932212.

It is not a de Polignac number, because 212239155 - 2⁶ = 212239091 is a prime.

It is a super-2 number, since 2×212239155² = 90090917830228050, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14116 + ... + 24974.

It is an arithmetic number, because the mean of its divisors is an integer number (21242160).

Almost surely, 2^212239155 is an apocalyptic number.

212239155 is a deficient number, since it is larger than the sum of its proper divisors (127635405).

212239155 is a wasteful number, since it uses less digits than its factorization.

212239155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12170.

The product of its digits is 5400, while the sum is 30.

The square root of 212239155 is about 14568.4300801425. The cubic root of 212239155 is about 596.4973280499.

The spelling of 212239155 in words is "two hundred twelve million, two hundred thirty-nine thousand, one hundred fifty-five".