48515561 has 2 divisors, whose sum is σ = 48515562. Its totient is φ = 48515560.

The previous prime is 48515549. The next prime is 48515563. The reversal of 48515561 is 16551584.

It is a happy number.

48515561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36481600 + 12033961 = 6040^2 + 3469^2 .

It is a cyclic number.

It is not a de Polignac number, because 48515561 - 2¹⁰ = 48514537 is a prime.

Together with 48515563, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (48515563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24257780 + 24257781.

It is an arithmetic number, because the mean of its divisors is an integer number (24257781).

Almost surely, 2^48515561 is an apocalyptic number.

It is an amenable number.

48515561 is a deficient number, since it is larger than the sum of its proper divisors (1).

48515561 is an equidigital number, since it uses as much as digits as its factorization.

48515561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24000, while the sum is 35.

The square root of 48515561 is about 6965.3112636838. The cubic root of 48515561 is about 364.7206494566.

The spelling of 48515561 in words is "forty-eight million, five hundred fifteen thousand, five hundred sixty-one".