51313432 has 16 divisors (see below), whose sum is σ = 99316800. Its totient is φ = 24828960.

The previous prime is 51313417. The next prime is 51313439. The reversal of 51313432 is 23431315.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51313439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103207 + ... + 103702.

It is an arithmetic number, because the mean of its divisors is an integer number (6207300).

Almost surely, 2^51313432 is an apocalyptic number.

It is an amenable number.

51313432 is a deficient number, since it is larger than the sum of its proper divisors (48003368).

51313432 is a wasteful number, since it uses less digits than its factorization.

51313432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206946 (or 206942 counting only the distinct ones).

The product of its digits is 1080, while the sum is 22.

The square root of 51313432 is about 7163.3394447004. The cubic root of 51313432 is about 371.6011256287.

Adding to 51313432 its reverse (23431315), we get a palindrome (74744747).

The spelling of 51313432 in words is "fifty-one million, three hundred thirteen thousand, four hundred thirty-two".