155033201220403 has 16 divisors (see below), whose sum is σ = 172076261788800. Its totient is φ = 138483956508480.

The previous prime is 155033201220389. The next prime is 155033201220421. The reversal of 155033201220403 is 304022102330551.

It is not a de Polignac number, because 155033201220403 - 2²⁹ = 155032664349491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155033201220203) 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, 55988538 + ... + 58692271.

It is an arithmetic number, because the mean of its divisors is an integer number (10754766361800).

Almost surely, 2^{155033201220403} is an apocalyptic number.

155033201220403 is a deficient number, since it is larger than the sum of its proper divisors (17043060568397).

155033201220403 is a wasteful number, since it uses less digits than its factorization.

155033201220403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114682962.

The product of its (nonzero) digits is 21600, while the sum is 31.

Adding to 155033201220403 its reverse (304022102330551), we get a palindrome (459055303550954).

The spelling of 155033201220403 in words is "one hundred fifty-five trillion, thirty-three billion, two hundred one million, two hundred twenty thousand, four hundred three".