212046145 has 4 divisors (see below), whose sum is σ = 254455380. Its totient is φ = 169636912.

The previous prime is 212046127. The next prime is 212046157. The reversal of 212046145 is 541640212.

It is a happy number.

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 159744321 + 52301824 = 12639^2 + 7232^2 .

It is a cyclic number.

It is not a de Polignac number, because 212046145 - 2⁵ = 212046113 is a prime.

It is a super-2 number, since 2×212046145² = 89927135218722050, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21204610 + ... + 21204619.

It is an arithmetic number, because the mean of its divisors is an integer number (63613845).

Almost surely, 2^212046145 is an apocalyptic number.

It is an amenable number.

212046145 is a deficient number, since it is larger than the sum of its proper divisors (42409235).

212046145 is an equidigital number, since it uses as much as digits as its factorization.

212046145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42409234.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 212046145 is about 14561.8043181468. The cubic root of 212046145 is about 596.3164552563.

Adding to 212046145 its reverse (541640212), we get a palindrome (753686357).

The spelling of 212046145 in words is "two hundred twelve million, forty-six thousand, one hundred forty-five".