633212161 has 2 divisors, whose sum is σ = 633212162. Its totient is φ = 633212160.

The previous prime is 633212143. The next prime is 633212179. The reversal of 633212161 is 161212336.

It is a balanced prime because it is at equal distance from previous prime (633212143) and next prime (633212179).

It can be written as a sum of positive squares in only one way, i.e., 480442561 + 152769600 = 21919^2 + 12360^2 .

It is a cyclic number.

It is not a de Polignac number, because 633212161 - 2⁷ = 633212033 is a prime.

It is not a weakly prime, because it can be changed into another prime (633212101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 316606080 + 316606081.

It is an arithmetic number, because the mean of its divisors is an integer number (316606081).

Almost surely, 2^633212161 is an apocalyptic number.

It is an amenable number.

633212161 is a deficient number, since it is larger than the sum of its proper divisors (1).

633212161 is an equidigital number, since it uses as much as digits as its factorization.

633212161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 25.

The square root of 633212161 is about 25163.7072189294. The cubic root of 633212161 is about 858.7163836868.

Adding to 633212161 its reverse (161212336), we get a palindrome (794424497).

The spelling of 633212161 in words is "six hundred thirty-three million, two hundred twelve thousand, one hundred sixty-one".