220261553 has 4 divisors (see below), whose sum is σ = 225633828. Its totient is φ = 214889280.

The previous prime is 220261549. The next prime is 220261567. The reversal of 220261553 is 355162022.

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 114233344 + 106028209 = 10688^2 + 10297^2 .

It is a cyclic number.

It is not a de Polignac number, because 220261553 - 2² = 220261549 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (220261753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2686076 + ... + 2686157.

It is an arithmetic number, because the mean of its divisors is an integer number (56408457).

Almost surely, 2^220261553 is an apocalyptic number.

It is an amenable number.

220261553 is a deficient number, since it is larger than the sum of its proper divisors (5372275).

220261553 is an equidigital number, since it uses as much as digits as its factorization.

220261553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5372274.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 220261553 is about 14841.2113050115. The cubic root of 220261553 is about 603.9202131718.

The spelling of 220261553 in words is "two hundred twenty million, two hundred sixty-one thousand, five hundred fifty-three".