53688551 has 4 divisors (see below), whose sum is σ = 61358352. Its totient is φ = 46018752.

The previous prime is 53688539. The next prime is 53688563. The reversal of 53688551 is 15588635.

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

It is an interprime number because it is at equal distance from previous prime (53688539) and next prime (53688563).

It is a cyclic number.

It is not a de Polignac number, because 53688551 - 2⁶ = 53688487 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 53688499 and 53688508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53688751) 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, 3834890 + ... + 3834903.

It is an arithmetic number, because the mean of its divisors is an integer number (15339588).

Almost surely, 2^53688551 is an apocalyptic number.

53688551 is a deficient number, since it is larger than the sum of its proper divisors (7669801).

53688551 is an equidigital number, since it uses as much as digits as its factorization.

53688551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7669800.

The product of its digits is 144000, while the sum is 41.

The square root of 53688551 is about 7327.2471638399. The cubic root of 53688551 is about 377.2482446378.

The spelling of 53688551 in words is "fifty-three million, six hundred eighty-eight thousand, five hundred fifty-one".