51313232 has 10 divisors (see below), whose sum is σ = 99419418. Its totient is φ = 25656608.

The previous prime is 51313231. The next prime is 51313247. The reversal of 51313232 is 23231315.

51313232 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 33131536 + 18181696 = 5756^2 + 4264^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51313231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1603523 + ... + 1603554.

Almost surely, 2^51313232 is an apocalyptic number.

It is an amenable number.

51313232 is a deficient number, since it is larger than the sum of its proper divisors (48106186).

51313232 is a wasteful number, since it uses less digits than its factorization.

51313232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3207085 (or 3207079 counting only the distinct ones).

The product of its digits is 540, while the sum is 20.

The square root of 51313232 is about 7163.3254847173. The cubic root of 51313232 is about 371.6006428420.

Adding to 51313232 its reverse (23231315), we get a palindrome (74544547).

The spelling of 51313232 in words is "fifty-one million, three hundred thirteen thousand, two hundred thirty-two".