211502005540 has 144 divisors (see below), whose sum is σ = 547753328640. Its totient is φ = 68278775040.

The previous prime is 211502005523. The next prime is 211502005543. The reversal of 211502005540 is 45500205112.

It is not an unprimeable number, because it can be changed into a prime (211502005543) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 1029981 + ... + 1218139.

It is an arithmetic number, because the mean of its divisors is an integer number (3803842560).

Almost surely, 2^211502005540 is an apocalyptic number.

211502005540 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 211502005540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (273876664320).

211502005540 is an abundant number, since it is smaller than the sum of its proper divisors (336251323100).

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

211502005540 is a wasteful number, since it uses less digits than its factorization.

211502005540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188250 (or 188241 counting only the distinct ones).

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

The spelling of 211502005540 in words is "two hundred eleven billion, five hundred two million, five thousand, five hundred forty".