212051115 has 80 divisors (see below), whose sum is σ = 423925920. Its totient is φ = 100776960.

The previous prime is 212051113. The next prime is 212051131. The reversal of 212051115 is 511150212.

212051115 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 212051115 - 2¹ = 212051113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212051111) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 130005 + ... + 131625.

It is an arithmetic number, because the mean of its divisors is an integer number (5299074).

Almost surely, 2^212051115 is an apocalyptic number.

212051115 is a deficient number, since it is larger than the sum of its proper divisors (211874805).

212051115 is a wasteful number, since it uses less digits than its factorization.

212051115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1674 (or 1665 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 18.

The square root of 212051115 is about 14561.9749690761. The cubic root of 212051115 is about 596.3211141001.

It can be divided in two parts, 2120 and 51115, that added together give a palindrome (53235).

The spelling of 212051115 in words is "two hundred twelve million, fifty-one thousand, one hundred fifteen".