53320624 has 60 divisors (see below), whose sum is σ = 125442864. Its totient is φ = 21850752.

The previous prime is 53320621. The next prime is 53320633. The reversal of 53320624 is 42602335.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53320621) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16554 + ... + 19510.

Almost surely, 2^53320624 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 53320624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62721432).

53320624 is an abundant number, since it is smaller than the sum of its proper divisors (72122240).

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

53320624 is a wasteful number, since it uses less digits than its factorization.

53320624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3002 (or 2989 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 53320624 is about 7302.0972329872. The cubic root of 53320624 is about 376.3845093256.

Adding to 53320624 its reverse (42602335), we get a palindrome (95922959).

The spelling of 53320624 in words is "fifty-three million, three hundred twenty thousand, six hundred twenty-four".