221734244725853 has 4 divisors (see below), whose sum is σ = 221871033280668. Its totient is φ = 221597456171040.

The previous prime is 221734244725771. The next prime is 221734244725871. The reversal of 221734244725853 is 358527442437122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 60609759441529 + 161124485284324 = 7785227^2 + 12693482^2 .

It is a cyclic number.

It is not a de Polignac number, because 221734244725853 - 2⁴² = 217336198214749 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221734244725792 and 221734244725801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221734244775853) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 68394274976 + ... + 68394278217.

It is an arithmetic number, because the mean of its divisors is an integer number (55467758320167).

Almost surely, 2^{221734244725853} is an apocalyptic number.

It is an amenable number.

221734244725853 is a deficient number, since it is larger than the sum of its proper divisors (136788554815).

221734244725853 is a wasteful number, since it uses less digits than its factorization.

221734244725853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136788554814.

The product of its digits is 90316800, while the sum is 59.

The spelling of 221734244725853 in words is "two hundred twenty-one trillion, seven hundred thirty-four billion, two hundred forty-four million, seven hundred twenty-five thousand, eight hundred fifty-three".