51535524 has 96 divisors (see below), whose sum is σ = 134064000. Its totient is φ = 15344640.

The previous prime is 51535513. The next prime is 51535537. The reversal of 51535524 is 42553515.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 51535491 and 51535500.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 345802 + ... + 345950.

It is an arithmetic number, because the mean of its divisors is an integer number (1396500).

Almost surely, 2^51535524 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 51535524, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67032000).

51535524 is an abundant number, since it is smaller than the sum of its proper divisors (82528476).

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

51535524 is a wasteful number, since it uses less digits than its factorization.

51535524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253 (or 251 counting only the distinct ones).

The product of its digits is 15000, while the sum is 30.

The square root of 51535524 is about 7178.8246948926. The cubic root of 51535524 is about 372.1364686029.

Subtracting from 51535524 its reverse (42553515), we obtain a square (8982009 = 2997²).

The spelling of 51535524 in words is "fifty-one million, five hundred thirty-five thousand, five hundred twenty-four".