220351000521 has 16 divisors (see below), whose sum is σ = 303526932480. Its totient is φ = 142045622160.

The previous prime is 220351000517. The next prime is 220351000543. The reversal of 220351000521 is 125000153022.

It is not a de Polignac number, because 220351000521 - 2² = 220351000517 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (220351000621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 854931 + ... + 1082408.

It is an arithmetic number, because the mean of its divisors is an integer number (18970433280).

Almost surely, 2^220351000521 is an apocalyptic number.

It is an amenable number.

220351000521 is a deficient number, since it is larger than the sum of its proper divisors (83175931959).

220351000521 is a wasteful number, since it uses less digits than its factorization.

220351000521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1938596.

The product of its (nonzero) digits is 600, while the sum is 21.

Adding to 220351000521 its reverse (125000153022), we get a palindrome (345351153543).

The spelling of 220351000521 in words is "two hundred twenty billion, three hundred fifty-one million, five hundred twenty-one", and thus it is an aban number.