203455555144323 has 24 divisors (see below), whose sum is σ = 288172169141040. Its totient is φ = 127657442826240.

The previous prime is 203455555144249. The next prime is 203455555144339. The reversal of 203455555144323 is 323441555554302.

It is not a de Polignac number, because 203455555144323 - 2⁸ = 203455555144067 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (203455555149323) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 127251903 + ... + 128840823.

It is an arithmetic number, because the mean of its divisors is an integer number (12007173714210).

Almost surely, 2^{203455555144323} is an apocalyptic number.

203455555144323 is a deficient number, since it is larger than the sum of its proper divisors (84716613996717).

203455555144323 is a wasteful number, since it uses less digits than its factorization.

203455555144323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1736647 (or 1736630 counting only the distinct ones).

The product of its (nonzero) digits is 21600000, while the sum is 51.

The spelling of 203455555144323 in words is "two hundred three trillion, four hundred fifty-five billion, five hundred fifty-five million, one hundred forty-four thousand, three hundred twenty-three".