451221044 has 24 divisors (see below), whose sum is σ = 831949440. Its totient is φ = 213542784.

The previous prime is 451221013. The next prime is 451221079. The reversal of 451221044 is 440122154.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116117 + ... + 119939.

It is an arithmetic number, because the mean of its divisors is an integer number (34664560).

Almost surely, 2^451221044 is an apocalyptic number.

It is an amenable number.

451221044 is a deficient number, since it is larger than the sum of its proper divisors (380728396).

451221044 is a wasteful number, since it uses less digits than its factorization.

451221044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5399 (or 5397 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 451221044 is about 21241.9642217946. The cubic root of 451221044 is about 767.0019157203.

Adding to 451221044 its reverse (440122154), we get a palindrome (891343198).

The spelling of 451221044 in words is "four hundred fifty-one million, two hundred twenty-one thousand, forty-four".