155020553303 has 32 divisors (see below), whose sum is σ = 193773565440. Its totient is φ = 120482496000.

The previous prime is 155020553273. The next prime is 155020553323. The reversal of 155020553303 is 303355020551.

It is a cyclic number.

It is not a de Polignac number, because 155020553303 - 2⁸ = 155020553047 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 155020553303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155020553323) 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, 67960523 + ... + 67962803.

It is an arithmetic number, because the mean of its divisors is an integer number (6055423920).

Almost surely, 2^155020553303 is an apocalyptic number.

155020553303 is a deficient number, since it is larger than the sum of its proper divisors (38753012137).

155020553303 is a wasteful number, since it uses less digits than its factorization.

155020553303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4199.

The product of its (nonzero) digits is 33750, while the sum is 32.

Adding to 155020553303 its reverse (303355020551), we get a palindrome (458375573854).

The spelling of 155020553303 in words is "one hundred fifty-five billion, twenty million, five hundred fifty-three thousand, three hundred three".