55220451563 has 4 divisors (see below), whose sum is σ = 56156391480. Its totient is φ = 54284511648.

The previous prime is 55220451557. The next prime is 55220451599. The reversal of 55220451563 is 36515402255.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55220451563 - 2⁶ = 55220451499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55220451863) 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, 467969870 + ... + 467969987.

It is an arithmetic number, because the mean of its divisors is an integer number (14039097870).

Almost surely, 2^55220451563 is an apocalyptic number.

55220451563 is a deficient number, since it is larger than the sum of its proper divisors (935939917).

55220451563 is an equidigital number, since it uses as much as digits as its factorization.

55220451563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 935939916.

The product of its (nonzero) digits is 180000, while the sum is 38.

The spelling of 55220451563 in words is "fifty-five billion, two hundred twenty million, four hundred fifty-one thousand, five hundred sixty-three".