15500313155 has 4 divisors (see below), whose sum is σ = 18600375792. Its totient is φ = 12400250520.

The previous prime is 15500313151. The next prime is 15500313181. The reversal of 15500313155 is 55131300551.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 15500313155 - 2² = 15500313151 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15500313151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1550031311 + ... + 1550031320.

It is an arithmetic number, because the mean of its divisors is an integer number (4650093948).

Almost surely, 2^15500313155 is an apocalyptic number.

15500313155 is a deficient number, since it is larger than the sum of its proper divisors (3100062637).

15500313155 is an equidigital number, since it uses as much as digits as its factorization.

15500313155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3100062636.

The product of its (nonzero) digits is 5625, while the sum is 29.

The spelling of 15500313155 in words is "fifteen billion, five hundred million, three hundred thirteen thousand, one hundred fifty-five".