203144502155 has 32 divisors (see below), whose sum is σ = 290778139008. Its totient is φ = 133337318400.

The previous prime is 203144502151. The next prime is 203144502191. The reversal of 203144502155 is 551205441302.

It is not a de Polignac number, because 203144502155 - 2² = 203144502151 is a prime.

It is not an unprimeable number, because it can be changed into a prime (203144502151) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1259456 + ... + 1411565.

It is an arithmetic number, because the mean of its divisors is an integer number (9086816844).

Almost surely, 2^203144502155 is an apocalyptic number.

203144502155 is a deficient number, since it is larger than the sum of its proper divisors (87633636853).

203144502155 is a wasteful number, since it uses less digits than its factorization.

203144502155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2671127.

The product of its (nonzero) digits is 24000, while the sum is 32.

Adding to 203144502155 its reverse (551205441302), we get a palindrome (754349943457).

The spelling of 203144502155 in words is "two hundred three billion, one hundred forty-four million, five hundred two thousand, one hundred fifty-five".