451221153 has 8 divisors (see below), whose sum is σ = 627786048. Its totient is φ = 287735184.

The previous prime is 451221131. The next prime is 451221163. The reversal of 451221153 is 351122154.

It is a happy number.

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

It is not a de Polignac number, because 451221153 - 2⁸ = 451220897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (451221163) 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, 3269650 + ... + 3269787.

It is an arithmetic number, because the mean of its divisors is an integer number (78473256).

Almost surely, 2^451221153 is an apocalyptic number.

It is an amenable number.

451221153 is a deficient number, since it is larger than the sum of its proper divisors (176564895).

451221153 is a wasteful number, since it uses less digits than its factorization.

451221153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6539463.

The product of its digits is 1200, while the sum is 24.

The square root of 451221153 is about 21241.9667874705. The cubic root of 451221153 is about 767.0019774810.

The spelling of 451221153 in words is "four hundred fifty-one million, two hundred twenty-one thousand, one hundred fifty-three".