51532312 has 32 divisors (see below), whose sum is σ = 105774480. Its totient is φ = 23391360.

The previous prime is 51532301. The next prime is 51532331. The reversal of 51532312 is 21323515.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2283 + ... + 10405.

Almost surely, 2^51532312 is an apocalyptic number.

51532312 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51532312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52887240).

51532312 is an abundant number, since it is smaller than the sum of its proper divisors (54242168).

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

51532312 is a wasteful number, since it uses less digits than its factorization.

51532312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8203 (or 8199 counting only the distinct ones).

The product of its digits is 900, while the sum is 22.

The square root of 51532312 is about 7178.6009779065. The cubic root of 51532312 is about 372.1287371905.

Adding to 51532312 its reverse (21323515), we get a palindrome (72855827).

The spelling of 51532312 in words is "fifty-one million, five hundred thirty-two thousand, three hundred twelve".