633232261 has 2 divisors, whose sum is σ = 633232262. Its totient is φ = 633232260.

The previous prime is 633232219. The next prime is 633232279. The reversal of 633232261 is 162232336.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 514836100 + 118396161 = 22690^2 + 10881^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-633232261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (633232211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 316616130 + 316616131.

It is an arithmetic number, because the mean of its divisors is an integer number (316616131).

Almost surely, 2^633232261 is an apocalyptic number.

It is an amenable number.

633232261 is a deficient number, since it is larger than the sum of its proper divisors (1).

633232261 is an equidigital number, since it uses as much as digits as its factorization.

633232261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 28.

The square root of 633232261 is about 25164.1066004736. The cubic root of 633232261 is about 858.7254696444.

Adding to 633232261 its reverse (162232336), we get a palindrome (795464597).

The spelling of 633232261 in words is "six hundred thirty-three million, two hundred thirty-two thousand, two hundred sixty-one".