211042045 has 8 divisors (see below), whose sum is σ = 253978200. Its totient is φ = 168348480.

The previous prime is 211042037. The next prime is 211042057. The reversal of 211042045 is 540240112.

It can be written as a sum of positive squares in 4 ways, for example, as 94984516 + 116057529 = 9746^2 + 10773^2 .

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

It is not a de Polignac number, because 211042045 - 2³ = 211042037 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58726 + ... + 62215.

It is an arithmetic number, because the mean of its divisors is an integer number (31747275).

Almost surely, 2^211042045 is an apocalyptic number.

It is an amenable number.

211042045 is a deficient number, since it is larger than the sum of its proper divisors (42936155).

211042045 is a wasteful number, since it uses less digits than its factorization.

211042045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121295.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 211042045 is about 14527.2862228291. The cubic root of 211042045 is about 595.3737218562.

Adding to 211042045 its reverse (540240112), we get a palindrome (751282157).

The spelling of 211042045 in words is "two hundred eleven million, forty-two thousand, forty-five".