223942362454821 has 16 divisors (see below), whose sum is σ = 299448246787200. Its totient is φ = 148865701419840.

The previous prime is 223942362454799. The next prime is 223942362454841. The reversal of 223942362454821 is 128454263249322.

It is a happy number.

It is not a de Polignac number, because 223942362454821 - 2³⁰ = 223941288712997 is a prime.

It is a super-2 number, since 2×223942362454821² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223942362454841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114390991 + ... + 116332211.

It is an arithmetic number, because the mean of its divisors is an integer number (18715515424200).

Almost surely, 2^{223942362454821} is an apocalyptic number.

It is an amenable number.

223942362454821 is a deficient number, since it is larger than the sum of its proper divisors (75505884332379).

223942362454821 is a wasteful number, since it uses less digits than its factorization.

223942362454821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2051756.

The product of its digits is 39813120, while the sum is 57.

The spelling of 223942362454821 in words is "two hundred twenty-three trillion, nine hundred forty-two billion, three hundred sixty-two million, four hundred fifty-four thousand, eight hundred twenty-one".