2155201200520 has 32 divisors (see below), whose sum is σ = 4849362619200. Its totient is φ = 862052050368.

The previous prime is 2155201200517. The next prime is 2155201200557. The reversal of 2155201200520 is 250021025512.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 361357 + ... + 2107363.

It is an arithmetic number, because the mean of its divisors is an integer number (151542581850).

Almost surely, 2^{2155201200520} is an apocalyptic number.

2155201200520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2155201200520 is an abundant number, since it is smaller than the sum of its proper divisors (2694161418680).

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

2155201200520 is a wasteful number, since it uses less digits than its factorization.

2155201200520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1776877 (or 1776873 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 25.

The spelling of 2155201200520 in words is "two trillion, one hundred fifty-five billion, two hundred one million, two hundred thousand, five hundred twenty".