203255121034551 has 16 divisors (see below), whose sum is σ = 271881921362688. Its totient is φ = 135065879188800.

The previous prime is 203255121034541. The next prime is 203255121034621. The reversal of 203255121034551 is 155430121552302.

It is not a de Polignac number, because 203255121034551 - 2¹⁵ = 203255121001783 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203255121034541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69133020 + ... + 72013086.

It is an arithmetic number, because the mean of its divisors is an integer number (16992620085168).

Almost surely, 2^{203255121034551} is an apocalyptic number.

203255121034551 is a deficient number, since it is larger than the sum of its proper divisors (68626800328137).

203255121034551 is a wasteful number, since it uses less digits than its factorization.

203255121034551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2956022.

The product of its (nonzero) digits is 180000, while the sum is 39.

Adding to 203255121034551 its reverse (155430121552302), we get a palindrome (358685242586853).

The spelling of 203255121034551 in words is "two hundred three trillion, two hundred fifty-five billion, one hundred twenty-one million, thirty-four thousand, five hundred fifty-one".