48218021 has 4 divisors (see below), whose sum is σ = 48715212. Its totient is φ = 47720832.

The previous prime is 48217987. The next prime is 48218057. The reversal of 48218021 is 12081284.

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 15602500 + 32615521 = 3950^2 + 5711^2 .

It is a cyclic number.

It is not a de Polignac number, because 48218021 - 2¹⁸ = 47955877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (48218321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 248450 + ... + 248643.

It is an arithmetic number, because the mean of its divisors is an integer number (12178803).

Almost surely, 2^48218021 is an apocalyptic number.

It is an amenable number.

48218021 is a deficient number, since it is larger than the sum of its proper divisors (497191).

48218021 is an equidigital number, since it uses as much as digits as its factorization.

48218021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497190.

The product of its (nonzero) digits is 1024, while the sum is 26.

The square root of 48218021 is about 6943.9197143976. The cubic root of 48218021 is about 363.9735243191.

The spelling of 48218021 in words is "forty-eight million, two hundred eighteen thousand, twenty-one".