53311320 has 192 divisors, whose sum is σ = 190045440. Its totient is φ = 12902400.

The previous prime is 53311259. The next prime is 53311373. The reversal of 53311320 is 2311335.

53311320 is a `hidden beast` number, since 533 + 1 + 132 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 53311293 and 53311302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 189580 + ... + 189860.

It is an arithmetic number, because the mean of its divisors is an integer number (989820).

Almost surely, 2^53311320 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 53311320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95022720).

53311320 is an abundant number, since it is smaller than the sum of its proper divisors (136734120).

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

53311320 is a wasteful number, since it uses less digits than its factorization.

53311320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346 (or 339 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 18.

The square root of 53311320 is about 7301.4601279470. The cubic root of 53311320 is about 376.3626160761.

Adding to 53311320 its reverse (2311335), we get a palindrome (55622655).

The spelling of 53311320 in words is "fifty-three million, three hundred eleven thousand, three hundred twenty".