53331216 has 20 divisors (see below), whose sum is σ = 137772432. Its totient is φ = 17777056.

The previous prime is 53331209. The next prime is 53331251. The reversal of 53331216 is 61213335.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

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 3 ways as a sum of consecutive naturals, for example, 555486 + ... + 555581.

Almost surely, 2^53331216 is an apocalyptic number.

It is an amenable number.

53331216 is an abundant number, since it is smaller than the sum of its proper divisors (84441216).

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

53331216 is a wasteful number, since it uses less digits than its factorization.

53331216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111078 (or 1111072 counting only the distinct ones).

The product of its digits is 1620, while the sum is 24.

The square root of 53331216 is about 7302.8224680599. The cubic root of 53331216 is about 376.4094302691.

The spelling of 53331216 in words is "fifty-three million, three hundred thirty-one thousand, two hundred sixteen".