53731645 has 16 divisors (see below), whose sum is σ = 74478528. Its totient is φ = 36778240.

The previous prime is 53731637. The next prime is 53731651. The reversal of 53731645 is 54613735.

It is not a de Polignac number, because 53731645 - 2³ = 53731637 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 53731645.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27799 + ... + 29668.

It is an arithmetic number, because the mean of its divisors is an integer number (4654908).

Almost surely, 2^53731645 is an apocalyptic number.

53731645 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

53731645 is a deficient number, since it is larger than the sum of its proper divisors (20746883).

53731645 is a wasteful number, since it uses less digits than its factorization.

53731645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57500.

The product of its digits is 37800, while the sum is 34.

The square root of 53731645 is about 7330.1872418104. The cubic root of 53731645 is about 377.3491524838.

The spelling of 53731645 in words is "fifty-three million, seven hundred thirty-one thousand, six hundred forty-five".