211132404240 has 80 divisors (see below), whose sum is σ = 659219265600. Its totient is φ = 55896915456.

The previous prime is 211132404221. The next prime is 211132404271. The reversal of 211132404240 is 42404231112.

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 (24).

It is a self number, because there is not a number n which added to its sum of digits gives 211132404240.

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, 3131095 + ... + 3197814.

It is an arithmetic number, because the mean of its divisors is an integer number (8240240820).

Almost surely, 2^211132404240 is an apocalyptic number.

211132404240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211132404240 is an abundant number, since it is smaller than the sum of its proper divisors (448086861360).

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

211132404240 is a wasteful number, since it uses less digits than its factorization.

211132404240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6329064 (or 6329058 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 211132404240 its reverse (42404231112), we get a palindrome (253536635352).

The spelling of 211132404240 in words is "two hundred eleven billion, one hundred thirty-two million, four hundred four thousand, two hundred forty".