212065045 has 4 divisors (see below), whose sum is σ = 254478060. Its totient is φ = 169652032.

The previous prime is 212065039. The next prime is 212065069. The reversal of 212065045 is 540560212.

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 91987281 + 120077764 = 9591^2 + 10958^2 .

It is a cyclic number.

It is not a de Polignac number, because 212065045 - 2⁹ = 212064533 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21206500 + ... + 21206509.

It is an arithmetic number, because the mean of its divisors is an integer number (63619515).

Almost surely, 2^212065045 is an apocalyptic number.

It is an amenable number.

212065045 is a deficient number, since it is larger than the sum of its proper divisors (42413015).

212065045 is an equidigital number, since it uses as much as digits as its factorization.

212065045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42413014.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 212065045 is about 14562.4532617276. The cubic root of 212065045 is about 596.3341715985.

The spelling of 212065045 in words is "two hundred twelve million, sixty-five thousand, forty-five".