220401445 has 32 divisors (see below), whose sum is σ = 302569344. Its totient is φ = 152678400.

The previous prime is 220401439. The next prime is 220401473. The reversal of 220401445 is 544104022.

It is a happy number.

It is not a de Polignac number, because 220401445 - 2⁷ = 220401317 is a prime.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 95829 + ... + 98101.

It is an arithmetic number, because the mean of its divisors is an integer number (9455292).

Almost surely, 2^220401445 is an apocalyptic number.

It is an amenable number.

220401445 is a deficient number, since it is larger than the sum of its proper divisors (82167899).

220401445 is a wasteful number, since it uses less digits than its factorization.

220401445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2373.

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 220401445 is about 14845.9235145544. The cubic root of 220401445 is about 604.0480395763.

Adding to 220401445 its reverse (544104022), we get a palindrome (764505467).

The spelling of 220401445 in words is "two hundred twenty million, four hundred one thousand, four hundred forty-five".