51171232 has 24 divisors (see below), whose sum is σ = 115135776. Its totient is φ = 21930432.

The previous prime is 51171229. The next prime is 51171257. The reversal of 51171232 is 23217115.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113998 + ... + 114445.

It is an arithmetic number, because the mean of its divisors is an integer number (4797324).

Almost surely, 2^51171232 is an apocalyptic number.

It is an amenable number.

51171232 is an abundant number, since it is smaller than the sum of its proper divisors (63964544).

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

51171232 is a wasteful number, since it uses less digits than its factorization.

51171232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228460 (or 228452 counting only the distinct ones).

The product of its digits is 420, while the sum is 22.

The square root of 51171232 is about 7153.4070204344. The cubic root of 51171232 is about 371.2575471868.

Adding to 51171232 its reverse (23217115), we get a palindrome (74388347).

The spelling of 51171232 in words is "fifty-one million, one hundred seventy-one thousand, two hundred thirty-two".