211900349 has 4 divisors (see below), whose sum is σ = 211929564. Its totient is φ = 211871136.

The previous prime is 211900333. The next prime is 211900363. The reversal of 211900349 is 943009112.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 89908324 + 121992025 = 9482^2 + 11045^2 .

It is a cyclic number.

It is not a de Polignac number, because 211900349 - 2⁴ = 211900333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211900309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5489 + ... + 21305.

It is an arithmetic number, because the mean of its divisors is an integer number (52982391).

Almost surely, 2^211900349 is an apocalyptic number.

It is an amenable number.

211900349 is a deficient number, since it is larger than the sum of its proper divisors (29215).

211900349 is a wasteful number, since it uses less digits than its factorization.

211900349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29214.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 211900349 is about 14556.7973469441. The cubic root of 211900349 is about 596.1797546852.

The spelling of 211900349 in words is "two hundred eleven million, nine hundred thousand, three hundred forty-nine".