212151 has 4 divisors (see below), whose sum is σ = 282872. Its totient is φ = 141432.

The previous prime is 212141. The next prime is 212161. The reversal of 212151 is 151212.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (212141) and next prime (212161).

It is not a de Polignac number, because 212151 - 2⁹ = 211639 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212131) 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, 35356 + ... + 35361.

It is an arithmetic number, because the mean of its divisors is an integer number (70718).

2²¹²¹⁵¹ is an apocalyptic number.

212151 is a deficient number, since it is larger than the sum of its proper divisors (70721).

212151 is an equidigital number, since it uses as much as digits as its factorization.

212151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70720.

The product of its digits is 20, while the sum is 12.

The square root of 212151 is about 460.5985236624. The cubic root of 212151 is about 59.6414730184.

Adding to 212151 its reverse (151212), we get a palindrome (363363).

It can be divided in two parts, 212 and 151, that added together give a palindrome (363).

The spelling of 212151 in words is "two hundred twelve thousand, one hundred fifty-one".