211461 has 4 divisors (see below), whose sum is σ = 281952. Its totient is φ = 140972.

The previous prime is 211457. The next prime is 211469. The reversal of 211461 is 164112.

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 211461 - 2² = 211457 is a prime.

It is a D-number.

It is a Curzon number.

It is a nialpdrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 211461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211469) 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, 35241 + ... + 35246.

It is an arithmetic number, because the mean of its divisors is an integer number (70488).

2²¹¹⁴⁶¹ is an apocalyptic number.

It is an amenable number.

211461 is a deficient number, since it is larger than the sum of its proper divisors (70491).

211461 is an equidigital number, since it uses as much as digits as its factorization.

211461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70490.

The product of its digits is 48, while the sum is 15.

The square root of 211461 is about 459.8488882231. The cubic root of 211461 is about 59.5767434749.

Adding to 211461 its reverse (164112), we get a palindrome (375573).

It can be divided in two parts, 2 and 11461, that multiplied together give a palindrome (22922).

The spelling of 211461 in words is "two hundred eleven thousand, four hundred sixty-one".