53643330 has 256 divisors, whose sum is σ = 174182400. Its totient is φ = 11612160.

The previous prime is 53643283. The next prime is 53643341. The reversal of 53643330 is 3334635.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 53643294 and 53643303.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1730415 + ... + 1730445.

It is an arithmetic number, because the mean of its divisors is an integer number (680400).

Almost surely, 2^53643330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53643330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87091200).

53643330 is an abundant number, since it is smaller than the sum of its proper divisors (120539070).

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

53643330 is a wasteful number, since it uses less digits than its factorization.

53643330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106 (or 100 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 27.

The square root of 53643330 is about 7324.1607027700. The cubic root of 53643330 is about 377.1422981839.

Adding to 53643330 its reverse (3334635), we get a palindrome (56977965).

The spelling of 53643330 in words is "fifty-three million, six hundred forty-three thousand, three hundred thirty".