451480821 has 16 divisors (see below), whose sum is σ = 658279488. Its totient is φ = 272966400.

The previous prime is 451480817. The next prime is 451480859. The reversal of 451480821 is 128084154.

It is not a de Polignac number, because 451480821 - 2² = 451480817 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (451480021) 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, 2356 + ... + 30141.

It is an arithmetic number, because the mean of its divisors is an integer number (41142468).

Almost surely, 2^451480821 is an apocalyptic number.

It is an amenable number.

451480821 is a deficient number, since it is larger than the sum of its proper divisors (206798667).

451480821 is a wasteful number, since it uses less digits than its factorization.

451480821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32932.

The product of its (nonzero) digits is 10240, while the sum is 33.

The square root of 451480821 is about 21248.0780542618. The cubic root of 451480821 is about 767.1490802747.

The spelling of 451480821 in words is "four hundred fifty-one million, four hundred eighty thousand, eight hundred twenty-one".