221640241341240 has 96 divisors (see below), whose sum is σ = 722394769824000. Its totient is φ = 58934711704320.

The previous prime is 221640241341223. The next prime is 221640241341293. The reversal of 221640241341240 is 42143142046122.

221640241341240 is a `hidden beast` number, since 2 + 2 + 1 + 6 + 402 + 4 + 1 + 3 + 4 + 1 + 240 = 666.

It is a super-2 number, since 2×221640241341240² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 221640241341195 and 221640241341204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 881919256 + ... + 882170535.

It is an arithmetic number, because the mean of its divisors is an integer number (7524945519000).

Almost surely, 2^{221640241341240} is an apocalyptic number.

221640241341240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221640241341240 is an abundant number, since it is smaller than the sum of its proper divisors (500754528482760).

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

221640241341240 is a wasteful number, since it uses less digits than its factorization.

221640241341240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1764090157 (or 1764090150 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 36.

Adding to 221640241341240 its reverse (42143142046122), we get a palindrome (263783383387362).

The spelling of 221640241341240 in words is "two hundred twenty-one trillion, six hundred forty billion, two hundred forty-one million, three hundred forty-one thousand, two hundred forty".