53731665 has 48 divisors (see below), whose sum is σ = 102250512. Its totient is φ = 25938432.

The previous prime is 53731663. The next prime is 53731681. The reversal of 53731665 is 56613735.

It is a happy number.

53731665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 1718721 + 52012944 = 1311^2 + 7212^2 .

It is not a de Polignac number, because 53731665 - 2¹ = 53731663 is a prime.

It is not an unprimeable number, because it can be changed into a prime (53731661) 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 in 47 ways as a sum of consecutive naturals, for example, 30139 + ... + 31871.

It is an arithmetic number, because the mean of its divisors is an integer number (2130219).

Almost surely, 2^53731665 is an apocalyptic number.

It is an amenable number.

53731665 is a deficient number, since it is larger than the sum of its proper divisors (48518847).

53731665 is a wasteful number, since it uses less digits than its factorization.

53731665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1810 (or 1807 counting only the distinct ones).

The product of its digits is 56700, while the sum is 36.

The square root of 53731665 is about 7330.1886060319. The cubic root of 53731665 is about 377.3491993028.

The spelling of 53731665 in words is "fifty-three million, seven hundred thirty-one thousand, six hundred sixty-five".