212651 has 2 divisors, whose sum is σ = 212652. Its totient is φ = 212650.

The previous prime is 212633. The next prime is 212669. The reversal of 212651 is 156212.

It is a balanced prime because it is at equal distance from previous prime (212633) and next prime (212669).

It is a cyclic number.

It is not a de Polignac number, because 212651 - 2⁶ = 212587 is a prime.

It is not a weakly prime, because it can be changed into another prime (212671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106325 + 106326.

It is an arithmetic number, because the mean of its divisors is an integer number (106326).

2²¹²⁶⁵¹ is an apocalyptic number.

212651 is a deficient number, since it is larger than the sum of its proper divisors (1).

212651 is an equidigital number, since it uses as much as digits as its factorization.

212651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120, while the sum is 17.

The square root of 212651 is about 461.1409762752. The cubic root of 212651 is about 59.6882908350.

Adding to 212651 its reverse (156212), we get a palindrome (368863).

The spelling of 212651 in words is "two hundred twelve thousand, six hundred fifty-one".