53663551 has 6 divisors (see below), whose sum is σ = 53982656. Its totient is φ = 53346300.

The previous prime is 53663503. The next prime is 53663557. The reversal of 53663551 is 15536635.

It is not a de Polignac number, because 53663551 - 2⁹ = 53663039 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 (53663557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35746 + ... + 37216.

Almost surely, 2^53663551 is an apocalyptic number.

53663551 is a deficient number, since it is larger than the sum of its proper divisors (319105).

53663551 is an equidigital number, since it uses as much as digits as its factorization.

53663551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1853 (or 1662 counting only the distinct ones).

The product of its digits is 40500, while the sum is 34.

The square root of 53663551 is about 7325.5410039123. The cubic root of 53663551 is about 377.1896805045.

The spelling of 53663551 in words is "fifty-three million, six hundred sixty-three thousand, five hundred fifty-one".