42165563273 has 2 divisors, whose sum is σ = 42165563274. Its totient is φ = 42165563272.

The previous prime is 42165563239. The next prime is 42165563329. The reversal of 42165563273 is 37236556124.

42165563273 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38131153984 + 4034409289 = 195272^2 + 63517^2 .

It is a cyclic number.

It is not a de Polignac number, because 42165563273 - 2²⁰ = 42164514697 is a prime.

It is a super-2 number, since 2×42165563273² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42165563203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21082781636 + 21082781637.

It is an arithmetic number, because the mean of its divisors is an integer number (21082781637).

Almost surely, 2^42165563273 is an apocalyptic number.

It is an amenable number.

42165563273 is a deficient number, since it is larger than the sum of its proper divisors (1).

42165563273 is an equidigital number, since it uses as much as digits as its factorization.

42165563273 is an evil number, because the sum of its binary digits is even.

The product of its digits is 907200, while the sum is 44.

The spelling of 42165563273 in words is "forty-two billion, one hundred sixty-five million, five hundred sixty-three thousand, two hundred seventy-three".