42231013261 has 2 divisors, whose sum is σ = 42231013262. Its totient is φ = 42231013260.

The previous prime is 42231013217. The next prime is 42231013289. The reversal of 42231013261 is 16231013224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35528480100 + 6702533161 = 188490^2 + 81869^2 .

It is a cyclic number.

It is not a de Polignac number, because 42231013261 - 2⁹ = 42231012749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42231013061) 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, 21115506630 + 21115506631.

It is an arithmetic number, because the mean of its divisors is an integer number (21115506631).

Almost surely, 2^42231013261 is an apocalyptic number.

It is an amenable number.

42231013261 is a deficient number, since it is larger than the sum of its proper divisors (1).

42231013261 is an equidigital number, since it uses as much as digits as its factorization.

42231013261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 42231013261 its reverse (16231013224), we get a palindrome (58462026485).

The spelling of 42231013261 in words is "forty-two billion, two hundred thirty-one million, thirteen thousand, two hundred sixty-one".