53218887 has 8 divisors (see below), whose sum is σ = 71351280. Its totient is φ = 35282880.

The previous prime is 53218859. The next prime is 53218889. The reversal of 53218887 is 78881235.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 53218887 - 2¹⁰ = 53217863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53218889) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48462 + ... + 49547.

It is an arithmetic number, because the mean of its divisors is an integer number (8918910).

Almost surely, 2^53218887 is an apocalyptic number.

53218887 is a deficient number, since it is larger than the sum of its proper divisors (18132393).

53218887 is a wasteful number, since it uses less digits than its factorization.

53218887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98193.

The product of its digits is 107520, while the sum is 42.

The square root of 53218887 is about 7295.1276205424. The cubic root of 53218887 is about 376.1449734265.

The spelling of 53218887 in words is "fifty-three million, two hundred eighteen thousand, eight hundred eighty-seven".