49685521 has 2 divisors, whose sum is σ = 49685522. Its totient is φ = 49685520.

The previous prime is 49685501. The next prime is 49685593. The reversal of 49685521 is 12558694.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34939921 + 14745600 = 5911^2 + 3840^2 .

It is a cyclic number.

It is not a de Polignac number, because 49685521 - 2⁷ = 49685393 is a prime.

It is not a weakly prime, because it can be changed into another prime (49685501) 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 as a sum of consecutive naturals, namely, 24842760 + 24842761.

It is an arithmetic number, because the mean of its divisors is an integer number (24842761).

Almost surely, 2^49685521 is an apocalyptic number.

It is an amenable number.

49685521 is a deficient number, since it is larger than the sum of its proper divisors (1).

49685521 is an equidigital number, since it uses as much as digits as its factorization.

49685521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 86400, while the sum is 40.

The square root of 49685521 is about 7048.7957127441. The cubic root of 49685521 is about 367.6291578662.

The spelling of 49685521 in words is "forty-nine million, six hundred eighty-five thousand, five hundred twenty-one".