53210664 has 72 divisors (see below), whose sum is σ = 156086190. Its totient is φ = 16368768.

The previous prime is 53210657. The next prime is 53210681. The reversal of 53210664 is 46601235.

It can be written as a sum of positive squares in 3 ways, for example, as 28708164 + 24502500 = 5358^2 + 4950^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 9982 + ... + 14354.

Almost surely, 2^53210664 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 53210664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78043095).

53210664 is an abundant number, since it is smaller than the sum of its proper divisors (102875526).

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

53210664 is a wasteful number, since it uses less digits than its factorization.

53210664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4411 (or 4391 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 53210664 is about 7294.5640034206. The cubic root of 53210664 is about 376.1255993558.

Adding to 53210664 its reverse (46601235), we get a palindrome (99811899).

The spelling of 53210664 in words is "fifty-three million, two hundred ten thousand, six hundred sixty-four".