53440563 has 16 divisors (see below), whose sum is σ = 78011136. Its totient is φ = 32271840.

The previous prime is 53440553. The next prime is 53440573. The reversal of 53440563 is 36504435.

It is an interprime number because it is at equal distance from previous prime (53440553) and next prime (53440573).

It is a de Polignac number, because none of the positive numbers 2^k-53440563 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 53440563.

It is not an unprimeable number, because it can be changed into a prime (53440553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6906 + ... + 12432.

It is an arithmetic number, because the mean of its divisors is an integer number (4875696).

Almost surely, 2^53440563 is an apocalyptic number.

53440563 is a deficient number, since it is larger than the sum of its proper divisors (24570573).

53440563 is a wasteful number, since it uses less digits than its factorization.

53440563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5834.

The product of its (nonzero) digits is 21600, while the sum is 30.

The square root of 53440563 is about 7310.3052603841. The cubic root of 53440563 is about 376.6665101243. Note that the first 3 decimals are identical.

Adding to 53440563 its reverse (36504435), we get a palindrome (89944998).

The spelling of 53440563 in words is "fifty-three million, four hundred forty thousand, five hundred sixty-three".