2155143550120 has 96 divisors (see below), whose sum is σ = 5334889190400. Its totient is φ = 782965687680.

The previous prime is 2155143550097. The next prime is 2155143550127. The reversal of 2155143550120 is 210553415512.

It is not an unprimeable number, because it can be changed into a prime (2155143550127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5056261 + ... + 5465899.

It is an arithmetic number, because the mean of its divisors is an integer number (55571762400).

Almost surely, 2^{2155143550120} is an apocalyptic number.

2155143550120 is a gapful number since it is divisible by the number (20) 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 2155143550120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2667444595200).

2155143550120 is an abundant number, since it is smaller than the sum of its proper divisors (3179745640280).

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

2155143550120 is a wasteful number, since it uses less digits than its factorization.

2155143550120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410759 (or 410744 counting only the distinct ones).

The product of its (nonzero) digits is 30000, while the sum is 34.

Adding to 2155143550120 its reverse (210553415512), we get a palindrome (2365696965632).

The spelling of 2155143550120 in words is "two trillion, one hundred fifty-five billion, one hundred forty-three million, five hundred fifty thousand, one hundred twenty".