42230053661 has 2 divisors, whose sum is σ = 42230053662. Its totient is φ = 42230053660.

The previous prime is 42230053633. The next prime is 42230053681. The reversal of 42230053661 is 16635003224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35879557561 + 6350496100 = 189419^2 + 79690^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42230053661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42230053681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21115026830 + 21115026831.

It is an arithmetic number, because the mean of its divisors is an integer number (21115026831).

Almost surely, 2^42230053661 is an apocalyptic number.

It is an amenable number.

42230053661 is a deficient number, since it is larger than the sum of its proper divisors (1).

42230053661 is an equidigital number, since it uses as much as digits as its factorization.

42230053661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 32.

Adding to 42230053661 its reverse (16635003224), we get a palindrome (58865056885).

The spelling of 42230053661 in words is "forty-two billion, two hundred thirty million, fifty-three thousand, six hundred sixty-one".