2155032322000 has 80 divisors (see below), whose sum is σ = 5214825158400. Its totient is φ = 861358339200.

The previous prime is 2155032321989. The next prime is 2155032322013. The reversal of 2155032322000 is 2232305512.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2229541 + ... + 3046459.

It is an arithmetic number, because the mean of its divisors is an integer number (65185314480).

Almost surely, 2^{2155032322000} is an apocalyptic number.

2155032322000 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 2155032322000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2607412579200).

2155032322000 is an abundant number, since it is smaller than the sum of its proper divisors (3059792836400).

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

2155032322000 is a wasteful number, since it uses less digits than its factorization.

2155032322000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 818261 (or 818245 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 25.

Adding to 2155032322000 its reverse (2232305512), we get a palindrome (2157264627512).

The spelling of 2155032322000 in words is "two trillion, one hundred fifty-five billion, thirty-two million, three hundred twenty-two thousand".