51545232 has 60 divisors (see below), whose sum is σ = 146724240. Its totient is φ = 16887744.

The previous prime is 51545213. The next prime is 51545237. The reversal of 51545232 is 23254515.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 51545196 and 51545205.

It is not an unprimeable number, because it can be changed into a prime (51545237) 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, 5463 + ... + 11529.

It is an arithmetic number, because the mean of its divisors is an integer number (2445404).

Almost surely, 2^51545232 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 51545232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73362120).

51545232 is an abundant number, since it is smaller than the sum of its proper divisors (95179008).

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

51545232 is a wasteful number, since it uses less digits than its factorization.

51545232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6140 (or 6131 counting only the distinct ones).

The product of its digits is 6000, while the sum is 27.

The square root of 51545232 is about 7179.5008183021. The cubic root of 51545232 is about 372.1598341945.

Adding to 51545232 its reverse (23254515), we get a palindrome (74799747).

The spelling of 51545232 in words is "fifty-one million, five hundred forty-five thousand, two hundred thirty-two".