446440221 has 16 divisors (see below), whose sum is σ = 661773120. Its totient is φ = 297455760.

The previous prime is 446440199. The next prime is 446440231. The reversal of 446440221 is 122044644.

It is a happy number.

It is not a de Polignac number, because 446440221 - 2⁶ = 446440157 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (446440231) 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, 58306 + ... + 65516.

It is an arithmetic number, because the mean of its divisors is an integer number (41360820).

Almost surely, 2^446440221 is an apocalyptic number.

It is an amenable number.

446440221 is a deficient number, since it is larger than the sum of its proper divisors (215332899).

446440221 is a wasteful number, since it uses less digits than its factorization.

446440221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9513 (or 9507 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

The square root of 446440221 is about 21129.1320455905. The cubic root of 446440221 is about 764.2834197187.

Adding to 446440221 its reverse (122044644), we get a palindrome (568484865).

The spelling of 446440221 in words is "four hundred forty-six million, four hundred forty thousand, two hundred twenty-one".