2002172217520 has 40 divisors (see below), whose sum is σ = 4768588228320. Its totient is φ = 781335498240.

The previous prime is 2002172217467. The next prime is 2002172217541. The reversal of 2002172217520 is 257122712002.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 305205900 + ... + 305212459.

It is an arithmetic number, because the mean of its divisors is an integer number (119214705708).

Almost surely, 2^{2002172217520} is an apocalyptic number.

2002172217520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2002172217520 is an abundant number, since it is smaller than the sum of its proper divisors (2766416010800).

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

2002172217520 is a wasteful number, since it uses less digits than its factorization.

2002172217520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610418413 (or 610418407 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 31.

Adding to 2002172217520 its reverse (257122712002), we get a palindrome (2259294929522).

The spelling of 2002172217520 in words is "two trillion, two billion, one hundred seventy-two million, two hundred seventeen thousand, five hundred twenty".