53231663 has 4 divisors (see below), whose sum is σ = 54236088. Its totient is φ = 52227240.

The previous prime is 53231627. The next prime is 53231707. The reversal of 53231663 is 36613235.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 53231663 - 2⁶ = 53231599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53231623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 502133 + ... + 502238.

It is an arithmetic number, because the mean of its divisors is an integer number (13559022).

Almost surely, 2^53231663 is an apocalyptic number.

53231663 is a gapful number since it is divisible by the number (53) formed by its first and last digit.

53231663 is a deficient number, since it is larger than the sum of its proper divisors (1004425).

53231663 is a wasteful number, since it uses less digits than its factorization.

53231663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1004424.

The product of its digits is 9720, while the sum is 29.

The square root of 53231663 is about 7296.0032209423. The cubic root of 53231663 is about 376.1750707845.

Adding to 53231663 its reverse (36613235), we get a palindrome (89844898).

The spelling of 53231663 in words is "fifty-three million, two hundred thirty-one thousand, six hundred sixty-three".