212064145 has 8 divisors (see below), whose sum is σ = 256997160. Its totient is φ = 167971200.

The previous prime is 212064143. The next prime is 212064169. The reversal of 212064145 is 541460212.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 150111504 + 61952641 = 12252^2 + 7871^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 212064145 - 2¹ = 212064143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212064143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 209460 + ... + 210469.

It is an arithmetic number, because the mean of its divisors is an integer number (32124645).

Almost surely, 2^212064145 is an apocalyptic number.

It is an amenable number.

212064145 is a deficient number, since it is larger than the sum of its proper divisors (44933015).

212064145 is a wasteful number, since it uses less digits than its factorization.

212064145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420035.

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

The square root of 212064145 is about 14562.4223603081. The cubic root of 212064145 is about 596.3333279870. Note that the first 4 decimals are identical.

The spelling of 212064145 in words is "two hundred twelve million, sixty-four thousand, one hundred forty-five".