53218672 has 20 divisors (see below), whose sum is σ = 111043240. Its totient is φ = 24562368.

The previous prime is 53218667. The next prime is 53218673. The reversal of 53218672 is 27681235.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53218673) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 127722 + ... + 128137.

It is an arithmetic number, because the mean of its divisors is an integer number (5552162).

Almost surely, 2^53218672 is an apocalyptic number.

53218672 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

53218672 is an abundant number, since it is smaller than the sum of its proper divisors (57824568).

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

53218672 is a wasteful number, since it uses less digits than its factorization.

53218672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255880 (or 255874 counting only the distinct ones).

The product of its digits is 20160, while the sum is 34.

The square root of 53218672 is about 7295.1128846646. The cubic root of 53218672 is about 376.1444668941.

The spelling of 53218672 in words is "fifty-three million, two hundred eighteen thousand, six hundred seventy-two".