53321553 has 6 divisors (see below), whose sum is σ = 77020034. Its totient is φ = 35547696.

The previous prime is 53321549. The next prime is 53321561. The reversal of 53321553 is 35512335.

It can be written as a sum of positive squares in only one way, i.e., 52881984 + 439569 = 7272^2 + 663^2 .

It is not a de Polignac number, because 53321553 - 2² = 53321549 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53321533) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2962300 + ... + 2962317.

Almost surely, 2^53321553 is an apocalyptic number.

It is an amenable number.

53321553 is a deficient number, since it is larger than the sum of its proper divisors (23698481).

53321553 is a wasteful number, since it uses less digits than its factorization.

53321553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5924623 (or 5924620 counting only the distinct ones).

The product of its digits is 6750, while the sum is 27.

The square root of 53321553 is about 7302.1608445720. The cubic root of 53321553 is about 376.3866952164.

Adding to 53321553 its reverse (35512335), we get a palindrome (88833888).

The spelling of 53321553 in words is "fifty-three million, three hundred twenty-one thousand, five hundred fifty-three".