211404032340 has 48 divisors (see below), whose sum is σ = 597463376832. Its totient is φ = 55847543296.

The previous prime is 211404032339. The next prime is 211404032369. The reversal of 211404032340 is 43230404112.

It is a super-2 number, since 2×211404032340² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 211404032340.

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, 16458069 + ... + 16470908.

It is an arithmetic number, because the mean of its divisors is an integer number (12447153684).

Almost surely, 2^211404032340 is an apocalyptic number.

211404032340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211404032340 is an abundant number, since it is smaller than the sum of its proper divisors (386059344492).

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

211404032340 is a wasteful number, since it uses less digits than its factorization.

211404032340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32929096 (or 32929094 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 211404032340 its reverse (43230404112), we get a palindrome (254634436452).

The spelling of 211404032340 in words is "two hundred eleven billion, four hundred four million, thirty-two thousand, three hundred forty".