48728221 has 4 divisors (see below), whose sum is σ = 49315392. Its totient is φ = 48141052.

The previous prime is 48728219. The next prime is 48728231. The reversal of 48728221 is 12282784.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 48728221 - 2¹ = 48728219 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 (48728231) 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, 293461 + ... + 293626.

It is an arithmetic number, because the mean of its divisors is an integer number (12328848).

Almost surely, 2^48728221 is an apocalyptic number.

It is an amenable number.

48728221 is a deficient number, since it is larger than the sum of its proper divisors (587171).

48728221 is an equidigital number, since it uses as much as digits as its factorization.

48728221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 587170.

The product of its digits is 14336, while the sum is 34.

The square root of 48728221 is about 6980.5602210711. The cubic root of 48728221 is about 365.2527704288.

The spelling of 48728221 in words is "forty-eight million, seven hundred twenty-eight thousand, two hundred twenty-one".