53408553 has 24 divisors (see below), whose sum is σ = 81689664. Its totient is φ = 30956640.

The previous prime is 53408539. The next prime is 53408557. The reversal of 53408553 is 35580435.

It is not a de Polignac number, because 53408553 - 2⁵ = 53408521 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53408557) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5151 + ... + 11547.

It is an arithmetic number, because the mean of its divisors is an integer number (3403736).

Almost surely, 2^53408553 is an apocalyptic number.

It is an amenable number.

53408553 is a deficient number, since it is larger than the sum of its proper divisors (28281111).

53408553 is a wasteful number, since it uses less digits than its factorization.

53408553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6445 (or 6434 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 33.

The square root of 53408553 is about 7308.1155573787. The cubic root of 53408553 is about 376.5912894651.

Adding to 53408553 its reverse (35580435), we get a palindrome (88988988).

The spelling of 53408553 in words is "fifty-three million, four hundred eight thousand, five hundred fifty-three".