211380481 has 8 divisors (see below), whose sum is σ = 228372200. Its totient is φ = 194493312.

The previous prime is 211380467. The next prime is 211380523. The reversal of 211380481 is 184083112.

It can be written as a sum of positive squares in 4 ways, for example, as 19280881 + 192099600 = 4391^2 + 13860^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 211380481 - 2⁷ = 211380353 is a prime.

It is a super-2 number, since 2×211380481² = 89363415495582722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211380401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21906 + ... + 30043.

It is an arithmetic number, because the mean of its divisors is an integer number (28546525).

Almost surely, 2^211380481 is an apocalyptic number.

It is an amenable number.

211380481 is a deficient number, since it is larger than the sum of its proper divisors (16991719).

211380481 is a wasteful number, since it uses less digits than its factorization.

211380481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52275.

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 211380481 is about 14538.9298436990. The cubic root of 211380481 is about 595.6918074263.

The spelling of 211380481 in words is "two hundred eleven million, three hundred eighty thousand, four hundred eighty-one".