220516520401 has 4 divisors (see below), whose sum is σ = 223173346032. Its totient is φ = 217859694772.

The previous prime is 220516520381. The next prime is 220516520417. The reversal of 220516520401 is 104025615022.

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 not a de Polignac number, because 220516520401 - 2¹⁷ = 220516389329 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 220516520401.

It is not an unprimeable number, because it can be changed into a prime (220516520431) 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, 1328412691 + ... + 1328412856.

It is an arithmetic number, because the mean of its divisors is an integer number (55793336508).

Almost surely, 2^220516520401 is an apocalyptic number.

It is an amenable number.

220516520401 is a deficient number, since it is larger than the sum of its proper divisors (2656825631).

220516520401 is an equidigital number, since it uses as much as digits as its factorization.

220516520401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2656825630.

The product of its (nonzero) digits is 4800, while the sum is 28.

The spelling of 220516520401 in words is "two hundred twenty billion, five hundred sixteen million, five hundred twenty thousand, four hundred one".