55221001001 has 8 divisors (see below), whose sum is σ = 57624653184. Its totient is φ = 52817577120.

The previous prime is 55221000983. The next prime is 55221001007. The reversal of 55221001001 is 10010012255.

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-55221001001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55221001007) 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, 596636 + ... + 682946.

It is an arithmetic number, because the mean of its divisors is an integer number (7203081648).

Almost surely, 2^55221001001 is an apocalyptic number.

It is an amenable number.

55221001001 is a deficient number, since it is larger than the sum of its proper divisors (2403652183).

55221001001 is a wasteful number, since it uses less digits than its factorization.

55221001001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114151.

The product of its (nonzero) digits is 100, while the sum is 17.

Adding to 55221001001 its reverse (10010012255), we get a palindrome (65231013256).

The spelling of 55221001001 in words is "fifty-five billion, two hundred twenty-one million, one thousand, one".