15000000050 has 36 divisors (see below), whose sum is σ = 32455107450. Its totient is φ = 5142856320.

The previous prime is 15000000047. The next prime is 15000000077. The reversal of 15000000050 is 5000000051.

It can be written as a sum of positive squares in 3 ways, for example, as 9485006881 + 5514993169 = 97391^2 + 74263^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 14999999968 and 15000000040.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3058775 + ... + 3063674.

Almost surely, 2^15000000050 is an apocalyptic number.

15000000050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15000000050 is an abundant number, since it is smaller than the sum of its proper divisors (17455107400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15000000050 is a wasteful number, since it uses less digits than its factorization.

15000000050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6122475 (or 6122463 counting only the distinct ones).

The product of its (nonzero) digits is 25, while the sum is 11.

Subtracting from 15000000050 its reverse (5000000051), we obtain a palindrome (9999999999).

The spelling of 15000000050 in words is "fifteen billion, fifty", and thus it is an aban number and an uban number.