211530654080 has 128 divisors (see below), whose sum is σ = 555450220800. Its totient is φ = 76673710080.

The previous prime is 211530654079. The next prime is 211530654131. The reversal of 211530654080 is 80456035112.

It is a tau number, because it is divible by the number of its divisors (128).

It is a self number, because there is not a number n which added to its sum of digits gives 211530654080.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98486 + ... + 657845.

It is an arithmetic number, because the mean of its divisors is an integer number (4339454850).

Almost surely, 2^211530654080 is an apocalyptic number.

211530654080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211530654080 is an abundant number, since it is smaller than the sum of its proper divisors (343919566720).

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

211530654080 is a wasteful number, since it uses less digits than its factorization.

211530654080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756392 (or 756380 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 35.

Adding to 211530654080 its reverse (80456035112), we get a palindrome (291986689192).

The spelling of 211530654080 in words is "two hundred eleven billion, five hundred thirty million, six hundred fifty-four thousand, eighty".