220454545 has 8 divisors (see below), whose sum is σ = 265176360. Its totient is φ = 175943040.

The previous prime is 220454543. The next prime is 220454569. The reversal of 220454545 is 545454022.

It can be written as a sum of positive squares in 4 ways, for example, as 18558864 + 201895681 = 4308^2 + 14209^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 220454545 - 2¹ = 220454543 is a prime.

It is a super-2 number, since 2×220454545² = 97200412822314050, which contains 22 as substring.

220454545 is a modest number, since divided by 454545 gives 220 as remainder.

It is not an unprimeable number, because it can be changed into a prime (220454543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50260 + ... + 54469.

It is an arithmetic number, because the mean of its divisors is an integer number (33147045).

Almost surely, 2^220454545 is an apocalyptic number.

It is an amenable number.

220454545 is a deficient number, since it is larger than the sum of its proper divisors (44721815).

220454545 is a wasteful number, since it uses less digits than its factorization.

220454545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105155.

The product of its (nonzero) digits is 32000, while the sum is 31.

The square root of 220454545 is about 14847.7117765668. The cubic root of 220454545 is about 604.0965455731.

The spelling of 220454545 in words is "two hundred twenty million, four hundred fifty-four thousand, five hundred forty-five".