220261505 has 16 divisors (see below), whose sum is σ = 271192320. Its totient is φ = 171658752.

The previous prime is 220261493. The next prime is 220261511. The reversal of 220261505 is 505162022.

It is a cyclic number.

It is not a de Polignac number, because 220261505 - 2⁶ = 220261441 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51281 + ... + 55409.

It is an arithmetic number, because the mean of its divisors is an integer number (16949520).

Almost surely, 2^220261505 is an apocalyptic number.

It is an amenable number.

220261505 is a deficient number, since it is larger than the sum of its proper divisors (50930815).

220261505 is a wasteful number, since it uses less digits than its factorization.

220261505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4408.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 220261505 is about 14841.2096878927. The cubic root of 220261505 is about 603.9201693025.

The spelling of 220261505 in words is "two hundred twenty million, two hundred sixty-one thousand, five hundred five".