203451116155 has 48 divisors (see below), whose sum is σ = 308834552736. Its totient is φ = 127754081280.

The previous prime is 203451116147. The next prime is 203451116179. The reversal of 203451116155 is 551611154302.

It is not a de Polignac number, because 203451116155 - 2³ = 203451116147 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 203451116155.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 506001 + ... + 814210.

It is an arithmetic number, because the mean of its divisors is an integer number (6434053182).

Almost surely, 2^203451116155 is an apocalyptic number.

203451116155 is a deficient number, since it is larger than the sum of its proper divisors (105383436581).

203451116155 is a wasteful number, since it uses less digits than its factorization.

203451116155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1320284 (or 1320277 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 34.

The spelling of 203451116155 in words is "two hundred three billion, four hundred fifty-one million, one hundred sixteen thousand, one hundred fifty-five".