221652234312340 has 24 divisors (see below), whose sum is σ = 501275052983880. Its totient is φ = 81840824976768.

The previous prime is 221652234312337. The next prime is 221652234312347. The reversal of 221652234312340 is 43213432256122.

221652234312340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 347397075216 + 221304837237124 = 589404^2 + 14876318^2 .

It is a junction number, because it is equal to n+sod(n) for n = 221652234312293 and 221652234312302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221652234312347) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 426254296495 + ... + 426254297014.

It is an arithmetic number, because the mean of its divisors is an integer number (20886460540995).

Almost surely, 2^{221652234312340} is an apocalyptic number.

221652234312340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221652234312340 is an abundant number, since it is smaller than the sum of its proper divisors (279622818671540).

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

221652234312340 is a wasteful number, since it uses less digits than its factorization.

221652234312340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 852508593531 (or 852508593529 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 40.

Adding to 221652234312340 its reverse (43213432256122), we get a palindrome (264865666568462).

The spelling of 221652234312340 in words is "two hundred twenty-one trillion, six hundred fifty-two billion, two hundred thirty-four million, three hundred twelve thousand, three hundred forty".