211312449 has 16 divisors (see below), whose sum is σ = 320337600. Its totient is φ = 137598048.

The previous prime is 211312447. The next prime is 211312457. The reversal of 211312449 is 944213112.

It is a happy number.

211312449 is a `hidden beast` number, since 211 + 3 + 1 + 2 + 449 = 666.

It is not a de Polignac number, because 211312449 - 2¹ = 211312447 is a prime.

It is a super-2 number, since 2×211312449² = 89305902204755202, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (211312441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89844 + ... + 92165.

It is an arithmetic number, because the mean of its divisors is an integer number (20021100).

Almost surely, 2^211312449 is an apocalyptic number.

It is an amenable number.

211312449 is a deficient number, since it is larger than the sum of its proper divisors (109025151).

211312449 is a wasteful number, since it uses less digits than its factorization.

211312449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182061 (or 182055 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 211312449 is about 14536.5900059127. The cubic root of 211312449 is about 595.6278935251.

The spelling of 211312449 in words is "two hundred eleven million, three hundred twelve thousand, four hundred forty-nine".