220455001 has 4 divisors (see below), whose sum is σ = 237413092. Its totient is φ = 203496912.

The previous prime is 220454987. The next prime is 220455049. The reversal of 220455001 is 100554022.

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 133518025 + 86936976 = 11555^2 + 9324^2 .

It is a cyclic number.

It is not a de Polignac number, because 220455001 - 2⁷ = 220454873 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 220455001.

It is not an unprimeable number, because it can be changed into a prime (220455061) 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, 8479026 + ... + 8479051.

It is an arithmetic number, because the mean of its divisors is an integer number (59353273).

Almost surely, 2^220455001 is an apocalyptic number.

It is an amenable number.

220455001 is a deficient number, since it is larger than the sum of its proper divisors (16958091).

220455001 is a wasteful number, since it uses less digits than its factorization.

220455001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16958090.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 220455001 is about 14847.7271324604. The cubic root of 220455001 is about 604.0969620880.

The spelling of 220455001 in words is "two hundred twenty million, four hundred fifty-five thousand, one".