481378821 has 32 divisors (see below), whose sum is σ = 801709056. Its totient is φ = 249600000.

The previous prime is 481378741. The next prime is 481378867. The reversal of 481378821 is 128873184.

It is not a de Polignac number, because 481378821 - 2²⁵ = 447824389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (481378871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 146446 + ... + 149696.

It is an arithmetic number, because the mean of its divisors is an integer number (25053408).

Almost surely, 2^481378821 is an apocalyptic number.

It is an amenable number.

481378821 is a deficient number, since it is larger than the sum of its proper divisors (320330235).

481378821 is a wasteful number, since it uses less digits than its factorization.

481378821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3913.

The product of its digits is 86016, while the sum is 42.

The square root of 481378821 is about 21940.3468751066. The cubic root of 481378821 is about 783.7225200919.

The spelling of 481378821 in words is "four hundred eighty-one million, three hundred seventy-eight thousand, eight hundred twenty-one".