220317556553 has 4 divisors (see below), whose sum is σ = 220948839300. Its totient is φ = 219686273808.

The previous prime is 220317556483. The next prime is 220317556559. The reversal of 220317556553 is 355655713022.

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

It can be written as a sum of positive squares in 2 ways, for example, as 68663389369 + 151654167184 = 262037^2 + 389428^2 .

It is a cyclic number.

It is not a de Polignac number, because 220317556553 - 2²² = 220313362249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220317556559) 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, 315640850 + ... + 315641547.

It is an arithmetic number, because the mean of its divisors is an integer number (55237209825).

Almost surely, 2^220317556553 is an apocalyptic number.

It is an amenable number.

220317556553 is a deficient number, since it is larger than the sum of its proper divisors (631282747).

220317556553 is an equidigital number, since it uses as much as digits as its factorization.

220317556553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631282746.

The product of its (nonzero) digits is 945000, while the sum is 44.

The spelling of 220317556553 in words is "two hundred twenty billion, three hundred seventeen million, five hundred fifty-six thousand, five hundred fifty-three".