211321260 has 72 divisors (see below), whose sum is σ = 663127920. Its totient is φ = 54407808.

The previous prime is 211321241. The next prime is 211321261. The reversal of 211321260 is 62123112.

211321260 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (211321261) 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 23 ways as a sum of consecutive naturals, for example, 15022 + ... + 25461.

It is an arithmetic number, because the mean of its divisors is an integer number (9210110).

Almost surely, 2^211321260 is an apocalyptic number.

211321260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211321260 is an abundant number, since it is smaller than the sum of its proper divisors (451806660).

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

211321260 is a wasteful number, since it uses less digits than its factorization.

211321260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40527 (or 40522 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 211321260 is about 14536.8930655763. The cubic root of 211321260 is about 595.6361719527.

Adding to 211321260 its reverse (62123112), we get a palindrome (273444372).

The spelling of 211321260 in words is "two hundred eleven million, three hundred twenty-one thousand, two hundred sixty".