53218872 has 96 divisors (see below), whose sum is σ = 171924480. Its totient is φ = 14541120.

The previous prime is 53218859. The next prime is 53218889. The reversal of 53218872 is 27881235.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9297 + ... + 13887.

It is an arithmetic number, because the mean of its divisors is an integer number (1790880).

Almost surely, 2^53218872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53218872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85962240).

53218872 is an abundant number, since it is smaller than the sum of its proper divisors (118705608).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

53218872 is a wasteful number, since it uses less digits than its factorization.

53218872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4633 (or 4626 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 53218872 is about 7295.1265924588. The cubic root of 53218872 is about 376.1449380871.

The spelling of 53218872 in words is "fifty-three million, two hundred eighteen thousand, eight hundred seventy-two".