42165555103 has 4 divisors (see below), whose sum is σ = 48189205840. Its totient is φ = 36141904368.

The previous prime is 42165555101. The next prime is 42165555143. The reversal of 42165555103 is 30155556124.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42165555103 - 2¹ = 42165555101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42165555101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3011825358 + ... + 3011825371.

It is an arithmetic number, because the mean of its divisors is an integer number (12047301460).

Almost surely, 2^42165555103 is an apocalyptic number.

42165555103 is a deficient number, since it is larger than the sum of its proper divisors (6023650737).

42165555103 is an equidigital number, since it uses as much as digits as its factorization.

42165555103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6023650736.

The product of its (nonzero) digits is 90000, while the sum is 37.

The spelling of 42165555103 in words is "forty-two billion, one hundred sixty-five million, five hundred fifty-five thousand, one hundred three".