15221120650 has 24 divisors (see below), whose sum is σ = 28969690464. Its totient is φ = 5946855600.

The previous prime is 15221120633. The next prime is 15221120653. The reversal of 15221120650 is 5602112251.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (15221120653) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3537646 + ... + 3541945.

It is an arithmetic number, because the mean of its divisors is an integer number (1207070436).

Almost surely, 2^15221120650 is an apocalyptic number.

15221120650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15221120650 is a deficient number, since it is larger than the sum of its proper divisors (13748569814).

15221120650 is a wasteful number, since it uses less digits than its factorization.

15221120650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7079646 (or 7079641 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 25.

The spelling of 15221120650 in words is "fifteen billion, two hundred twenty-one million, one hundred twenty thousand, six hundred fifty".