15500055101 has 4 divisors (see below), whose sum is σ = 15508959804. Its totient is φ = 15491150400.

The previous prime is 15500055089. The next prime is 15500055113. The reversal of 15500055101 is 10155000551.

It is a happy number.

15500055101 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10155000551 = 42797 ⋅237283.

It is an interprime number because it is at equal distance from previous prime (15500055089) and next prime (15500055113).

It can be written as a sum of positive squares in 2 ways, for example, as 2926918201 + 12573136900 = 54101^2 + 112130^2 .

It is a cyclic number.

It is not a de Polignac number, because 15500055101 - 2¹⁰ = 15500054077 is a prime.

It is a super-2 number, since 2×15500055101² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15500055161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4449740 + ... + 4453221.

It is an arithmetic number, because the mean of its divisors is an integer number (3877239951).

Almost surely, 2^15500055101 is an apocalyptic number.

It is an amenable number.

15500055101 is a deficient number, since it is larger than the sum of its proper divisors (8904703).

15500055101 is an equidigital number, since it uses as much as digits as its factorization.

15500055101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8904702.

The product of its (nonzero) digits is 625, while the sum is 23.

Adding to 15500055101 its reverse (10155000551), we get a palindrome (25655055652).

The spelling of 15500055101 in words is "fifteen billion, five hundred million, fifty-five thousand, one hundred one".