53291616 has 72 divisors (see below), whose sum is σ = 162744120. Its totient is φ = 15224832.

The previous prime is 53291611. The next prime is 53291633. The reversal of 53291616 is 61619235.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53291611) 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 11 ways as a sum of consecutive naturals, for example, 961 + ... + 10368.

It is an arithmetic number, because the mean of its divisors is an integer number (2260335).

Almost surely, 2^53291616 is an apocalyptic number.

53291616 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53291616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81372060).

53291616 is an abundant number, since it is smaller than the sum of its proper divisors (109452504).

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

53291616 is a wasteful number, since it uses less digits than its factorization.

53291616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11356 (or 11341 counting only the distinct ones).

The product of its digits is 9720, while the sum is 33.

The square root of 53291616 is about 7300.1106840924. The cubic root of 53291616 is about 376.3162421677.

The spelling of 53291616 in words is "fifty-three million, two hundred ninety-one thousand, six hundred sixteen".