211031045 has 4 divisors (see below), whose sum is σ = 253237260. Its totient is φ = 168824832.

The previous prime is 211031033. The next prime is 211031063. The reversal of 211031045 is 540130112.

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 22600516 + 188430529 = 4754^2 + 13727^2 .

It is a cyclic number.

It is not a de Polignac number, because 211031045 - 2²⁰ = 209982469 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, 21103100 + ... + 21103109.

It is an arithmetic number, because the mean of its divisors is an integer number (63309315).

Almost surely, 2^211031045 is an apocalyptic number.

It is an amenable number.

211031045 is a deficient number, since it is larger than the sum of its proper divisors (42206215).

211031045 is an equidigital number, since it uses as much as digits as its factorization.

211031045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42206214.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 211031045 is about 14526.9076199995. The cubic root of 211031045 is about 595.3633775908.

Adding to 211031045 its reverse (540130112), we get a palindrome (751161157).

The spelling of 211031045 in words is "two hundred eleven million, thirty-one thousand, forty-five".