48320821 has 2 divisors, whose sum is σ = 48320822. Its totient is φ = 48320820.

The previous prime is 48320813. The next prime is 48320827. The reversal of 48320821 is 12802384.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43956900 + 4363921 = 6630^2 + 2089^2 .

It is a cyclic number.

It is not a de Polignac number, because 48320821 - 2³ = 48320813 is a prime.

It is a super-2 number, since 2×48320821² = 4669803484228082, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 48320821.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (48320827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24160410 + 24160411.

It is an arithmetic number, because the mean of its divisors is an integer number (24160411).

Almost surely, 2^48320821 is an apocalyptic number.

It is an amenable number.

48320821 is a deficient number, since it is larger than the sum of its proper divisors (1).

48320821 is an equidigital number, since it uses as much as digits as its factorization.

48320821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 48320821 is about 6951.3179325938. The cubic root of 48320821 is about 364.2320025018.

It can be divided in two parts, 48320 and 821, that added together give a triangular number (49141 = T₃₁₃).

The spelling of 48320821 in words is "forty-eight million, three hundred twenty thousand, eight hundred twenty-one".