15121000550 has 24 divisors (see below), whose sum is σ = 28228868832. Its totient is φ = 6026076000.

The previous prime is 15121000549. The next prime is 15121000553. The reversal of 15121000550 is 5500012151.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15121000553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 544421 + ... + 571520.

It is an arithmetic number, because the mean of its divisors is an integer number (1176202868).

Almost surely, 2^15121000550 is an apocalyptic number.

15121000550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15121000550 is a deficient number, since it is larger than the sum of its proper divisors (13107868282).

15121000550 is a wasteful number, since it uses less digits than its factorization.

15121000550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1116224 (or 1116219 counting only the distinct ones).

The product of its (nonzero) digits is 250, while the sum is 20.

The spelling of 15121000550 in words is "fifteen billion, one hundred twenty-one million, five hundred fifty", and thus it is an aban number.