211234023240 has 128 divisors (see below), whose sum is σ = 657795755520. Its totient is φ = 54226713600.

The previous prime is 211234023191. The next prime is 211234023347. The reversal of 211234023240 is 42320432112.

It is a happy number.

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 211234023240.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37050 + ... + 651030.

It is an arithmetic number, because the mean of its divisors is an integer number (5139029340).

Almost surely, 2^211234023240 is an apocalyptic number.

211234023240 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 211234023240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (328897877760).

211234023240 is an abundant number, since it is smaller than the sum of its proper divisors (446561732280).

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

211234023240 is a wasteful number, since it uses less digits than its factorization.

211234023240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614103 (or 614099 counting only the distinct ones).

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

Adding to 211234023240 its reverse (42320432112), we get a palindrome (253554455352).

The spelling of 211234023240 in words is "two hundred eleven billion, two hundred thirty-four million, twenty-three thousand, two hundred forty".