155224322220 has 96 divisors (see below), whose sum is σ = 481912655616. Its totient is φ = 37013241600.

The previous prime is 155224322167. The next prime is 155224322221. The reversal of 155224322220 is 22223422551.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (155224322221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1887514 + ... + 1968033.

It is an arithmetic number, because the mean of its divisors is an integer number (5019923496).

Almost surely, 2^155224322220 is an apocalyptic number.

155224322220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155224322220 is an abundant number, since it is smaller than the sum of its proper divisors (326688333396).

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

155224322220 is a wasteful number, since it uses less digits than its factorization.

155224322220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3855631 (or 3855629 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 30.

Adding to 155224322220 its reverse (22223422551), we get a palindrome (177447744771).

The spelling of 155224322220 in words is "one hundred fifty-five billion, two hundred twenty-four million, three hundred twenty-two thousand, two hundred twenty".