212134045 has 4 divisors (see below), whose sum is σ = 254560860. Its totient is φ = 169707232.

The previous prime is 212134009. The next prime is 212134049. The reversal of 212134045 is 540431212.

212134045 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 57927321 + 154206724 = 7611^2 + 12418^2 .

It is a cyclic number.

It is not a de Polignac number, because 212134045 - 2¹⁵ = 212101277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212134049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21213400 + ... + 21213409.

It is an arithmetic number, because the mean of its divisors is an integer number (63640215).

Almost surely, 2^212134045 is an apocalyptic number.

It is an amenable number.

212134045 is a deficient number, since it is larger than the sum of its proper divisors (42426815).

212134045 is an equidigital number, since it uses as much as digits as its factorization.

212134045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42426814.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 212134045 is about 14564.8221753649. The cubic root of 212134045 is about 596.3988413730.

Adding to 212134045 its reverse (540431212), we get a palindrome (752565257).

The spelling of 212134045 in words is "two hundred twelve million, one hundred thirty-four thousand, forty-five".