42312323561 has 2 divisors, whose sum is σ = 42312323562. Its totient is φ = 42312323560.

The previous prime is 42312323509. The next prime is 42312323567. The reversal of 42312323561 is 16532321324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38712923536 + 3599400025 = 196756^2 + 59995^2 .

It is a cyclic number.

It is not a de Polignac number, because 42312323561 - 2¹⁰ = 42312322537 is a prime.

It is not a weakly prime, because it can be changed into another prime (42312323567) 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, 21156161780 + 21156161781.

It is an arithmetic number, because the mean of its divisors is an integer number (21156161781).

Almost surely, 2^42312323561 is an apocalyptic number.

It is an amenable number.

42312323561 is a deficient number, since it is larger than the sum of its proper divisors (1).

42312323561 is an equidigital number, since it uses as much as digits as its factorization.

42312323561 is an odious number, because the sum of its binary digits is odd.

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

Adding to 42312323561 its reverse (16532321324), we get a palindrome (58844644885).

The spelling of 42312323561 in words is "forty-two billion, three hundred twelve million, three hundred twenty-three thousand, five hundred sixty-one".