211320481 has 4 divisors (see below), whose sum is σ = 220508352. Its totient is φ = 202132612.

The previous prime is 211320467. The next prime is 211320491. The reversal of 211320481 is 184023112.

It is a happy number.

211320481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 211320481 - 2¹³ = 211312289 is a prime.

It is a super-2 number, since 2×211320481² = 89312691380142722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211320401) 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, 4593901 + ... + 4593946.

It is an arithmetic number, because the mean of its divisors is an integer number (55127088).

Almost surely, 2^211320481 is an apocalyptic number.

It is an amenable number.

211320481 is a deficient number, since it is larger than the sum of its proper divisors (9187871).

211320481 is an equidigital number, since it uses as much as digits as its factorization.

211320481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9187870.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 211320481 is about 14536.8662716557. The cubic root of 211320481 is about 595.6354400479.

Adding to 211320481 its reverse (184023112), we get a palindrome (395343593).

The spelling of 211320481 in words is "two hundred eleven million, three hundred twenty thousand, four hundred eighty-one".