48515521 has 4 divisors (see below), whose sum is σ = 50188500. Its totient is φ = 46842544.

The previous prime is 48515503. The next prime is 48515543. The reversal of 48515521 is 12551584.

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 26378496 + 22137025 = 5136^2 + 4705^2 .

It is a cyclic number.

It is not a de Polignac number, because 48515521 - 2⁷ = 48515393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (48515561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 836446 + ... + 836503.

It is an arithmetic number, because the mean of its divisors is an integer number (12547125).

Almost surely, 2^48515521 is an apocalyptic number.

It is an amenable number.

48515521 is a deficient number, since it is larger than the sum of its proper divisors (1672979).

48515521 is a wasteful number, since it uses less digits than its factorization.

48515521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1672978.

The product of its digits is 8000, while the sum is 31.

The square root of 48515521 is about 6965.3083923111. The cubic root of 48515521 is about 364.7205492219.

The spelling of 48515521 in words is "forty-eight million, five hundred fifteen thousand, five hundred twenty-one".