211249045 has 12 divisors (see below), whose sum is σ = 294886764. Its totient is φ = 144856320.

The previous prime is 211249033. The next prime is 211249091. The reversal of 211249045 is 540942112.

It can be written as a sum of positive squares in 2 ways, for example, as 56520324 + 154728721 = 7518^2 + 12439^2 .

It is not a de Polignac number, because 211249045 - 2¹⁵ = 211216277 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 11 ways as a sum of consecutive naturals, for example, 430876 + ... + 431365.

It is an arithmetic number, because the mean of its divisors is an integer number (24573897).

Almost surely, 2^211249045 is an apocalyptic number.

It is an amenable number.

211249045 is a deficient number, since it is larger than the sum of its proper divisors (83637719).

211249045 is an equidigital number, since it uses as much as digits as its factorization.

211249045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 862260 (or 862253 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 211249045 is about 14534.4090007128. The cubic root of 211249045 is about 595.5683151316.

The spelling of 211249045 in words is "two hundred eleven million, two hundred forty-nine thousand, forty-five".