211525040000 has 80 divisors (see below), whose sum is σ = 526578565920. Its totient is φ = 84609984000.

The previous prime is 211525039967. The next prime is 211525040003. The reversal of 211525040000 is 40525112.

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 (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211525040003) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1242032 + ... + 1402031.

It is an arithmetic number, because the mean of its divisors is an integer number (6582232074).

Almost surely, 2^211525040000 is an apocalyptic number.

211525040000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211525040000 is an abundant number, since it is smaller than the sum of its proper divisors (315053525920).

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

211525040000 is an frugal number, since it uses more digits than its factorization.

211525040000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2644097 (or 2644070 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

Adding to 211525040000 its reverse (40525112), we get a palindrome (211565565112).

The spelling of 211525040000 in words is "two hundred eleven billion, five hundred twenty-five million, forty thousand".