203142420165 has 16 divisors (see below), whose sum is σ = 325034791488. Its totient is φ = 108340317696.

The previous prime is 203142420157. The next prime is 203142420181. The reversal of 203142420165 is 561024241302.

It is not a de Polignac number, because 203142420165 - 2³ = 203142420157 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 771637 + ... + 1000853.

It is an arithmetic number, because the mean of its divisors is an integer number (20314674468).

Almost surely, 2^203142420165 is an apocalyptic number.

It is an amenable number.

203142420165 is a deficient number, since it is larger than the sum of its proper divisors (121892371323).

203142420165 is a wasteful number, since it uses less digits than its factorization.

203142420165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288308.

The product of its (nonzero) digits is 11520, while the sum is 30.

Adding to 203142420165 its reverse (561024241302), we get a palindrome (764166661467).

The spelling of 203142420165 in words is "two hundred three billion, one hundred forty-two million, four hundred twenty thousand, one hundred sixty-five".