53307553 has 4 divisors (see below), whose sum is σ = 57408148. Its totient is φ = 49206960.

The previous prime is 53307533. The next prime is 53307557. The reversal of 53307553 is 35570335.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 35570335 = 5 ⋅7114067.

It can be written as a sum of positive squares in 2 ways, for example, as 13010449 + 40297104 = 3607^2 + 6348^2 .

It is a cyclic number.

It is not a de Polignac number, because 53307553 - 2¹⁷ = 53176481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53307557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2050278 + ... + 2050303.

It is an arithmetic number, because the mean of its divisors is an integer number (14352037).

Almost surely, 2^53307553 is an apocalyptic number.

It is an amenable number.

53307553 is a deficient number, since it is larger than the sum of its proper divisors (4100595).

53307553 is a wasteful number, since it uses less digits than its factorization.

53307553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4100594.

The product of its (nonzero) digits is 23625, while the sum is 31.

The square root of 53307553 is about 7301.2021612882. The cubic root of 53307553 is about 376.3537512211.

Adding to 53307553 its reverse (35570335), we get a palindrome (88877888).

The spelling of 53307553 in words is "fifty-three million, three hundred seven thousand, five hundred fifty-three".