55221662005001 has 4 divisors (see below), whose sum is σ = 55249121809104. Its totient is φ = 55194202200900.

The previous prime is 55221662004941. The next prime is 55221662005009. The reversal of 55221662005001 is 10050026612255.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55221662005001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55221662005009) 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, 13729899035 + ... + 13729903056.

It is an arithmetic number, because the mean of its divisors is an integer number (13812280452276).

Almost surely, 2^{55221662005001} is an apocalyptic number.

It is an amenable number.

55221662005001 is a deficient number, since it is larger than the sum of its proper divisors (27459804103).

55221662005001 is a wasteful number, since it uses less digits than its factorization.

55221662005001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27459804102.

The product of its (nonzero) digits is 36000, while the sum is 35.

Adding to 55221662005001 its reverse (10050026612255), we get a palindrome (65271688617256).

The spelling of 55221662005001 in words is "fifty-five trillion, two hundred twenty-one billion, six hundred sixty-two million, five thousand, one".