211147400 has 24 divisors (see below), whose sum is σ = 490918170. Its totient is φ = 84458880.

The previous prime is 211147381. The next prime is 211147403. The reversal of 211147400 is 4741112.

211147400 is digitally balanced in base 3, 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 3 ways, for example, as 166978084 + 44169316 = 12922^2 + 6646^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (211147403) 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 5 ways as a sum of consecutive naturals, for example, 527669 + ... + 528068.

Almost surely, 2^211147400 is an apocalyptic number.

211147400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211147400 is an abundant number, since it is smaller than the sum of its proper divisors (279770770).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211147400 is a wasteful number, since it uses less digits than its factorization.

211147400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1055753 (or 1055744 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 211147400 is about 14530.9118777866. The cubic root of 211147400 is about 595.4727782054.

Adding to 211147400 its reverse (4741112), we get a palindrome (215888512).

The spelling of 211147400 in words is "two hundred eleven million, one hundred forty-seven thousand, four hundred".