155241203220 has 144 divisors (see below), whose sum is σ = 488637781632. Its totient is φ = 39865271040.

The previous prime is 155241203209. The next prime is 155241203239. The reversal of 155241203220 is 22302142551.

155241203220 is a `hidden beast` number, since 1 + 552 + 41 + 20 + 32 + 20 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 408294 + ... + 690786.

It is an arithmetic number, because the mean of its divisors is an integer number (3393317928).

Almost surely, 2^155241203220 is an apocalyptic number.

155241203220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155241203220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (244318890816).

155241203220 is an abundant number, since it is smaller than the sum of its proper divisors (333396578412).

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

155241203220 is a wasteful number, since it uses less digits than its factorization.

155241203220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282622 (or 282617 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

Adding to 155241203220 its reverse (22302142551), we get a palindrome (177543345771).

The spelling of 155241203220 in words is "one hundred fifty-five billion, two hundred forty-one million, two hundred three thousand, two hundred twenty".