42352158581 has 2 divisors, whose sum is σ = 42352158582. Its totient is φ = 42352158580.

The previous prime is 42352158551. The next prime is 42352158613. The reversal of 42352158581 is 18585125324.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32813511025 + 9538647556 = 181145^2 + 97666^2 .

It is a cyclic number.

It is not a de Polignac number, because 42352158581 - 2²² = 42347964277 is a prime.

It is a super-2 number, since 2×42352158581² (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 (42352158551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21176079290 + 21176079291.

It is an arithmetic number, because the mean of its divisors is an integer number (21176079291).

Almost surely, 2^42352158581 is an apocalyptic number.

It is an amenable number.

42352158581 is a deficient number, since it is larger than the sum of its proper divisors (1).

42352158581 is an equidigital number, since it uses as much as digits as its factorization.

42352158581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 384000, while the sum is 44.

The spelling of 42352158581 in words is "forty-two billion, three hundred fifty-two million, one hundred fifty-eight thousand, five hundred eighty-one".