53811887 has 4 divisors (see below), whose sum is σ = 53875536. Its totient is φ = 53748240.

The previous prime is 53811871. The next prime is 53811889. The reversal of 53811887 is 78811835.

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 53811887 - 2⁴ = 53811871 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 (53811889) 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, 30539 + ... + 32252.

It is an arithmetic number, because the mean of its divisors is an integer number (13468884).

Almost surely, 2^53811887 is an apocalyptic number.

53811887 is a deficient number, since it is larger than the sum of its proper divisors (63649).

53811887 is an equidigital number, since it uses as much as digits as its factorization.

53811887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63648.

The product of its digits is 53760, while the sum is 41.

The square root of 53811887 is about 7335.6585934734. The cubic root of 53811887 is about 377.5369014992.

The spelling of 53811887 in words is "fifty-three million, eight hundred eleven thousand, eight hundred eighty-seven".