445101221 has 16 divisors (see below), whose sum is σ = 473765760. Its totient is φ = 417288960.

The previous prime is 445101211. The next prime is 445101227. The reversal of 445101221 is 122101544.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-445101221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 445101193 and 445101202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445101227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 299801 + ... + 301281.

It is an arithmetic number, because the mean of its divisors is an integer number (29610360).

Almost surely, 2^445101221 is an apocalyptic number.

It is an amenable number.

445101221 is a deficient number, since it is larger than the sum of its proper divisors (28664539).

445101221 is a wasteful number, since it uses less digits than its factorization.

445101221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1756.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 445101221 is about 21097.4221411053. The cubic root of 445101221 is about 763.5185540924.

Adding to 445101221 its reverse (122101544), we get a palindrome (567202765).

The spelling of 445101221 in words is "four hundred forty-five million, one hundred one thousand, two hundred twenty-one".