53521765 has 16 divisors (see below), whose sum is σ = 73753920. Its totient is φ = 36875520.

The previous prime is 53521757. The next prime is 53521777. The reversal of 53521765 is 56712535.

53521765 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 53521765 - 2³ = 53521757 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 53521765.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 24564 + ... + 26653.

It is an arithmetic number, because the mean of its divisors is an integer number (4609620).

Almost surely, 2^53521765 is an apocalyptic number.

53521765 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

53521765 is a deficient number, since it is larger than the sum of its proper divisors (20232155).

53521765 is a wasteful number, since it uses less digits than its factorization.

53521765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51252.

The product of its digits is 31500, while the sum is 34.

The square root of 53521765 is about 7315.8570926447. The cubic root of 53521765 is about 376.8571929666.

It can be divided in two parts, 5352 and 1765, that added together give a palindrome (7117).

The spelling of 53521765 in words is "fifty-three million, five hundred twenty-one thousand, seven hundred sixty-five".