53115732 has 36 divisors (see below), whose sum is σ = 134810676. Its totient is φ = 17633280.

The previous prime is 53115709. The next prime is 53115737. The reversal of 53115732 is 23751135.

It can be written as a sum of positive squares in 2 ways, for example, as 42850116 + 10265616 = 6546^2 + 3204^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 53115696 and 53115705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53115737) 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, 6382 + ... + 12122.

It is an arithmetic number, because the mean of its divisors is an integer number (3744741).

Almost surely, 2^53115732 is an apocalyptic number.

It is an amenable number.

53115732 is an abundant number, since it is smaller than the sum of its proper divisors (81694944).

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

53115732 is a wasteful number, since it uses less digits than its factorization.

53115732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6008 (or 6003 counting only the distinct ones).

The product of its digits is 3150, while the sum is 27.

The square root of 53115732 is about 7288.0540612704. The cubic root of 53115732 is about 375.9017870089.

Adding to 53115732 its reverse (23751135), we get a palindrome (76866867).

The spelling of 53115732 in words is "fifty-three million, one hundred fifteen thousand, seven hundred thirty-two".