15500222122 has 64 divisors (see below), whose sum is σ = 30479120640. Its totient is φ = 5735116800.

The previous prime is 15500222117. The next prime is 15500222131. The reversal of 15500222122 is 22122200551.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 15500222093 and 15500222102.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 243978 + ... + 300874.

It is an arithmetic number, because the mean of its divisors is an integer number (476236260).

Almost surely, 2^15500222122 is an apocalyptic number.

15500222122 is a deficient number, since it is larger than the sum of its proper divisors (14978898518).

15500222122 is a wasteful number, since it uses less digits than its factorization.

15500222122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57007.

The product of its (nonzero) digits is 800, while the sum is 22.

Adding to 15500222122 its reverse (22122200551), we get a palindrome (37622422673).

The spelling of 15500222122 in words is "fifteen billion, five hundred million, two hundred twenty-two thousand, one hundred twenty-two".