4451403221 has 8 divisors (see below), whose sum is σ = 4496279424. Its totient is φ = 4406559120.

The previous prime is 4451403157. The next prime is 4451403287. The reversal of 4451403221 is 1223041544.

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

It is a cyclic number.

It is not a de Polignac number, because 4451403221 - 2⁶ = 4451403157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4451403421) 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, 350240 + ... + 362726.

It is an arithmetic number, because the mean of its divisors is an integer number (562034928).

Almost surely, 2^4451403221 is an apocalyptic number.

It is an amenable number.

4451403221 is a deficient number, since it is larger than the sum of its proper divisors (44876203).

4451403221 is a wasteful number, since it uses less digits than its factorization.

4451403221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16051.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 4451403221 is about 66718.8370776949. The cubic root of 4451403221 is about 1644.9990263696. Note that the first 3 decimals are identical.

Adding to 4451403221 its reverse (1223041544), we get a palindrome (5674444765).

The spelling of 4451403221 in words is "four billion, four hundred fifty-one million, four hundred three thousand, two hundred twenty-one".