211601045 has 8 divisors (see below), whose sum is σ = 254033496. Its totient is φ = 169206016.

The previous prime is 211601029. The next prime is 211601053. The reversal of 211601045 is 540106112.

211601045 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 276676 + 211324369 = 526^2 + 14537^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 211601045 - 2⁴ = 211601029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5129 + ... + 21201.

It is an arithmetic number, because the mean of its divisors is an integer number (31754187).

Almost surely, 2^211601045 is an apocalyptic number.

It is an amenable number.

211601045 is a deficient number, since it is larger than the sum of its proper divisors (42432451).

211601045 is a wasteful number, since it uses less digits than its factorization.

211601045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18711.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 211601045 is about 14546.5131560797. The cubic root of 211601045 is about 595.8989260384.

Adding to 211601045 its reverse (540106112), we get a palindrome (751707157).

The spelling of 211601045 in words is "two hundred eleven million, six hundred one thousand, forty-five".