42200423581 has 2 divisors, whose sum is σ = 42200423582. Its totient is φ = 42200423580.

The previous prime is 42200423567. The next prime is 42200423627. The reversal of 42200423581 is 18532400224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25443121081 + 16757302500 = 159509^2 + 129450^2 .

It is a cyclic number.

It is not a de Polignac number, because 42200423581 - 2¹⁹ = 42199899293 is a prime.

It is a super-2 number, since 2×42200423581² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42200423521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21100211790 + 21100211791.

It is an arithmetic number, because the mean of its divisors is an integer number (21100211791).

Almost surely, 2^42200423581 is an apocalyptic number.

It is an amenable number.

42200423581 is a deficient number, since it is larger than the sum of its proper divisors (1).

42200423581 is an equidigital number, since it uses as much as digits as its factorization.

42200423581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15360, while the sum is 31.

The spelling of 42200423581 in words is "forty-two billion, two hundred million, four hundred twenty-three thousand, five hundred eighty-one".