53215764 has 60 divisors (see below), whose sum is σ = 144934944. Its totient is φ = 15196272.

The previous prime is 53215753. The next prime is 53215777. The reversal of 53215764 is 46751235.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 27889 + ... + 29735.

Almost surely, 2^53215764 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 53215764, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72467472).

53215764 is an abundant number, since it is smaller than the sum of its proper divisors (91719180).

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

53215764 is a wasteful number, since it uses less digits than its factorization.

53215764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1882 (or 1859 counting only the distinct ones).

The product of its digits is 25200, while the sum is 33.

The square root of 53215764 is about 7294.9135704270. The cubic root of 53215764 is about 376.1376156143.

Adding to 53215764 its reverse (46751235), we get a palindrome (99966999).

The spelling of 53215764 in words is "fifty-three million, two hundred fifteen thousand, seven hundred sixty-four".