55221633423 has 24 divisors (see below), whose sum is σ = 89367694416. Its totient is φ = 32563123200.

The previous prime is 55221633377. The next prime is 55221633431. The reversal of 55221633423 is 32433612255.

55221633423 is a `hidden beast` number, since 5 + 5 + 221 + 6 + 3 + 3 + 423 = 666.

It is not a de Polignac number, because 55221633423 - 2⁶ = 55221633359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55221633463) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7534098 + ... + 7541423.

It is an arithmetic number, because the mean of its divisors is an integer number (3723653934).

Almost surely, 2^55221633423 is an apocalyptic number.

55221633423 is a deficient number, since it is larger than the sum of its proper divisors (34146060993).

55221633423 is a wasteful number, since it uses less digits than its factorization.

55221633423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15075575 (or 15075572 counting only the distinct ones).

The product of its digits is 129600, while the sum is 36.

The spelling of 55221633423 in words is "fifty-five billion, two hundred twenty-one million, six hundred thirty-three thousand, four hundred twenty-three".