2155220002002 has 8 divisors (see below), whose sum is σ = 4310440004016. Its totient is φ = 718406667332.

The previous prime is 2155220001959. The next prime is 2155220002081. The reversal of 2155220002002 is 2002000225512.

It is a sphenic number, since it is the product of 3 distinct primes.

2155220002002 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 2155220002002.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179601666828 + ... + 179601666839.

It is an arithmetic number, because the mean of its divisors is an integer number (538805000502).

Almost surely, 2^{2155220002002} is an apocalyptic number.

2155220002002 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2155220002002 is a wasteful number, since it uses less digits than its factorization.

2155220002002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359203333672.

The product of its (nonzero) digits is 800, while the sum is 21.

Adding to 2155220002002 its reverse (2002000225512), we get a palindrome (4157220227514).

The spelling of 2155220002002 in words is "two trillion, one hundred fifty-five billion, two hundred twenty million, two thousand, two".