53553887 has 4 divisors (see below), whose sum is σ = 54461640. Its totient is φ = 52646136.

The previous prime is 53553869. The next prime is 53553931. The reversal of 53553887 is 78835535.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78835535 = 5 ⋅15767107.

It is a cyclic number.

It is not a de Polignac number, because 53553887 - 2¹² = 53549791 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 (53553817) 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, 453788 + ... + 453905.

It is an arithmetic number, because the mean of its divisors is an integer number (13615410).

Almost surely, 2^53553887 is an apocalyptic number.

53553887 is a deficient number, since it is larger than the sum of its proper divisors (907753).

53553887 is an equidigital number, since it uses as much as digits as its factorization.

53553887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 907752.

The product of its digits is 504000, while the sum is 44.

The square root of 53553887 is about 7318.0521315443. The cubic root of 53553887 is about 376.9325703127.

The spelling of 53553887 in words is "fifty-three million, five hundred fifty-three thousand, eight hundred eighty-seven".