480820215287821 has 4 divisors (see below), whose sum is σ = 480833277896700. Its totient is φ = 480807152678944.

The previous prime is 480820215287663. The next prime is 480820215287827. The reversal of 480820215287821 is 128782512028084.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 325593658877796 + 155226556410025 = 18044214^2 + 12458995^2 .

It is a cyclic number.

It is not a de Polignac number, because 480820215287821 - 2¹⁹ = 480820214763533 is a prime.

It is a super-3 number, since 3×480820215287821³ (a number of 45 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (480820215287827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6531249226 + ... + 6531322843.

It is an arithmetic number, because the mean of its divisors is an integer number (120208319474175).

Almost surely, 2^{480820215287821} is an apocalyptic number.

It is an amenable number.

480820215287821 is a deficient number, since it is larger than the sum of its proper divisors (13062608879).

480820215287821 is a wasteful number, since it uses less digits than its factorization.

480820215287821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13062608878.

The product of its (nonzero) digits is 9175040, while the sum is 58.

The spelling of 480820215287821 in words is "four hundred eighty trillion, eight hundred twenty billion, two hundred fifteen million, two hundred eighty-seven thousand, eight hundred twenty-one".