48531865921 has 48 divisors (see below), whose sum is σ = 63737856000. Its totient is φ = 36103747680.

The previous prime is 48531865909. The next prime is 48531865957. The reversal of 48531865921 is 12956813584.

It is a happy number.

It is not a de Polignac number, because 48531865921 - 2⁹ = 48531865409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (48531865721) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11667040 + ... + 11671198.

It is an arithmetic number, because the mean of its divisors is an integer number (1327872000).

Almost surely, 2^48531865921 is an apocalyptic number.

It is an amenable number.

48531865921 is a deficient number, since it is larger than the sum of its proper divisors (15205990079).

48531865921 is a wasteful number, since it uses less digits than its factorization.

48531865921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4810 (or 4799 counting only the distinct ones).

The product of its digits is 2073600, while the sum is 52.

The spelling of 48531865921 in words is "forty-eight billion, five hundred thirty-one million, eight hundred sixty-five thousand, nine hundred twenty-one".