51311432 has 16 divisors (see below), whose sum is σ = 96913260. Its totient is φ = 25467904.

The previous prime is 51311401. The next prime is 51311441. The reversal of 51311432 is 23411315.

51311432 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 2 ways, for example, as 49758916 + 1552516 = 7054^2 + 1246^2 .

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 22313 + ... + 24504.

Almost surely, 2^51311432 is an apocalyptic number.

It is an amenable number.

51311432 is a deficient number, since it is larger than the sum of its proper divisors (45601828).

51311432 is a wasteful number, since it uses less digits than its factorization.

51311432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46960 (or 46956 counting only the distinct ones).

The product of its digits is 360, while the sum is 20.

The square root of 51311432 is about 7163.1998436453. The cubic root of 51311432 is about 371.5962977056.

Adding to 51311432 its reverse (23411315), we get a palindrome (74722747).

The spelling of 51311432 in words is "fifty-one million, three hundred eleven thousand, four hundred thirty-two".