55236645221 has 8 divisors (see below), whose sum is σ = 55454893824. Its totient is φ = 55018459440.

The previous prime is 55236645199. The next prime is 55236645223. The reversal of 55236645221 is 12254663255.

55236645221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55236645221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55236645223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2585435 + ... + 2606711.

It is an arithmetic number, because the mean of its divisors is an integer number (6931861728).

Almost surely, 2^55236645221 is an apocalyptic number.

It is an amenable number.

55236645221 is a deficient number, since it is larger than the sum of its proper divisors (218248603).

55236645221 is a wasteful number, since it uses less digits than its factorization.

55236645221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31411.

The product of its digits is 432000, while the sum is 41.

The spelling of 55236645221 in words is "fifty-five billion, two hundred thirty-six million, six hundred forty-five thousand, two hundred twenty-one".