442232501 has 2 divisors, whose sum is σ = 442232502. Its totient is φ = 442232500.

The previous prime is 442232489. The next prime is 442232521. The reversal of 442232501 is 105232244.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 317374225 + 124858276 = 17815^2 + 11174^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-442232501 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (442232521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221116250 + 221116251.

It is an arithmetic number, because the mean of its divisors is an integer number (221116251).

Almost surely, 2^442232501 is an apocalyptic number.

It is an amenable number.

442232501 is a deficient number, since it is larger than the sum of its proper divisors (1).

442232501 is an equidigital number, since it uses as much as digits as its factorization.

442232501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 442232501 is about 21029.3247870682. The cubic root of 442232501 is about 761.8747006840.

Adding to 442232501 its reverse (105232244), we get a palindrome (547464745).

The spelling of 442232501 in words is "four hundred forty-two million, two hundred thirty-two thousand, five hundred one".