15220651344550 has 48 divisors (see below), whose sum is σ = 29635251508224. Its totient is φ = 5808880980000.

The previous prime is 15220651344541. The next prime is 15220651344557. The reversal of 15220651344550 is 5544315602251.

15220651344550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 15220651344497 and 15220651344506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15220651344557) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 69043296 + ... + 69263395.

It is an arithmetic number, because the mean of its divisors is an integer number (617401073088).

Almost surely, 2^{15220651344550} is an apocalyptic number.

15220651344550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15220651344550 is a deficient number, since it is larger than the sum of its proper divisors (14414600163674).

15220651344550 is a wasteful number, since it uses less digits than its factorization.

15220651344550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138306805 (or 138306800 counting only the distinct ones).

The product of its (nonzero) digits is 720000, while the sum is 43.

The spelling of 15220651344550 in words is "fifteen trillion, two hundred twenty billion, six hundred fifty-one million, three hundred forty-four thousand, five hundred fifty".