48218721 has 4 divisors (see below), whose sum is σ = 64291632. Its totient is φ = 32145812.

The previous prime is 48218707. The next prime is 48218771. The reversal of 48218721 is 12781284.

It is a happy number.

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 48218721 - 2⁷ = 48218593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (48218771) 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, 8036451 + ... + 8036456.

It is an arithmetic number, because the mean of its divisors is an integer number (16072908).

Almost surely, 2^48218721 is an apocalyptic number.

It is an amenable number.

48218721 is a deficient number, since it is larger than the sum of its proper divisors (16072911).

48218721 is a wasteful number, since it uses less digits than its factorization.

48218721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16072910.

The product of its digits is 7168, while the sum is 33.

The square root of 48218721 is about 6943.9701180233. The cubic root of 48218721 is about 363.9752856263.

The spelling of 48218721 in words is "forty-eight million, two hundred eighteen thousand, seven hundred twenty-one".