42353254081 has 2 divisors, whose sum is σ = 42353254082. Its totient is φ = 42353254080.

The previous prime is 42353254063. The next prime is 42353254087. The reversal of 42353254081 is 18045235324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32358253456 + 9995000625 = 179884^2 + 99975^2 .

It is a cyclic number.

It is not a de Polignac number, because 42353254081 - 2¹³ = 42353245889 is a prime.

It is a super-3 number, since 3×42353254081³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 42353254081.

It is not a weakly prime, because it can be changed into another prime (42353254087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21176627040 + 21176627041.

It is an arithmetic number, because the mean of its divisors is an integer number (21176627041).

Almost surely, 2^42353254081 is an apocalyptic number.

It is an amenable number.

42353254081 is a deficient number, since it is larger than the sum of its proper divisors (1).

42353254081 is an equidigital number, since it uses as much as digits as its factorization.

42353254081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 115200, while the sum is 37.

The spelling of 42353254081 in words is "forty-two billion, three hundred fifty-three million, two hundred fifty-four thousand, eighty-one".