155412221322 has 64 divisors (see below), whose sum is σ = 329812061184. Its totient is φ = 48735198720.

The previous prime is 155412221311. The next prime is 155412221383. The reversal of 155412221322 is 223122214551.

It is a super-2 number, since 2×155412221322² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 155412221322.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8338558 + ... + 8357174.

It is an arithmetic number, because the mean of its divisors is an integer number (5153313456).

Almost surely, 2^155412221322 is an apocalyptic number.

155412221322 is an abundant number, since it is smaller than the sum of its proper divisors (174399839862).

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

155412221322 is a wasteful number, since it uses less digits than its factorization.

155412221322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19903.

The product of its digits is 9600, while the sum is 30.

Adding to 155412221322 its reverse (223122214551), we get a palindrome (378534435873).

The spelling of 155412221322 in words is "one hundred fifty-five billion, four hundred twelve million, two hundred twenty-one thousand, three hundred twenty-two".