223661433842 has 162 divisors, whose sum is σ = 443569897197. Its totient is φ = 84271572000.

The previous prime is 223661433839. The next prime is 223661433953. The reversal of 223661433842 is 248334166322.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 155243092081 + 68418341761 = 394009^2 + 261569^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=334411.

It is a junction number, because it is equal to n+sod(n) for n = 223661433793 and 223661433802.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 2214469592 + ... + 2214469692.

Almost surely, 2^223661433842 is an apocalyptic number.

223661433842 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

223661433842 is a deficient number, since it is larger than the sum of its proper divisors (219908463355).

223661433842 is a wasteful number, since it uses less digits than its factorization.

223661433842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326 (or 164 counting only the distinct ones).

The product of its digits is 995328, while the sum is 44.

The spelling of 223661433842 in words is "two hundred twenty-three billion, six hundred sixty-one million, four hundred thirty-three thousand, eight hundred forty-two".