451023321 has 8 divisors (see below), whose sum is σ = 687273664. Its totient is φ = 257727600.

The previous prime is 451023299. The next prime is 451023337. The reversal of 451023321 is 123320154.

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

It is not a de Polignac number, because 451023321 - 2⁵ = 451023289 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 21477301 = 451023321 / (4 + 5 + 1 + 0 + 2 + 3 + 3 + 2 + 1).

It is not an unprimeable number, because it can be changed into a prime (451021321) 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, 10738630 + ... + 10738671.

It is an arithmetic number, because the mean of its divisors is an integer number (85909208).

Almost surely, 2^451023321 is an apocalyptic number.

It is an amenable number.

451023321 is a deficient number, since it is larger than the sum of its proper divisors (236250343).

451023321 is a wasteful number, since it uses less digits than its factorization.

451023321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21477311.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 451023321 is about 21237.3096459980. The cubic root of 451023321 is about 766.8898671072.

Adding to 451023321 its reverse (123320154), we get a palindrome (574343475).

The spelling of 451023321 in words is "four hundred fifty-one million, twenty-three thousand, three hundred twenty-one".