223004130571661 has 4 divisors (see below), whose sum is σ = 223929458914524. Its totient is φ = 222078802228800.

The previous prime is 223004130571657. The next prime is 223004130571669. The reversal of 223004130571661 is 166175031400322.

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 139454110646761 + 83550019924900 = 11809069^2 + 9140570^2 .

It is a cyclic number.

It is not a de Polignac number, because 223004130571661 - 2² = 223004130571657 is a prime.

It is a super-3 number, since 3×223004130571661³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223004130571669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 462664171070 + ... + 462664171551.

It is an arithmetic number, because the mean of its divisors is an integer number (55982364728631).

Almost surely, 2^{223004130571661} is an apocalyptic number.

It is an amenable number.

223004130571661 is a deficient number, since it is larger than the sum of its proper divisors (925328342863).

223004130571661 is an equidigital number, since it uses as much as digits as its factorization.

223004130571661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 925328342862.

The product of its (nonzero) digits is 181440, while the sum is 41.

Adding to 223004130571661 its reverse (166175031400322), we get a palindrome (389179161971983).

The spelling of 223004130571661 in words is "two hundred twenty-three trillion, four billion, one hundred thirty million, five hundred seventy-one thousand, six hundred sixty-one".