51321364 has 12 divisors (see below), whose sum is σ = 89914804. Its totient is φ = 25631424.

The previous prime is 51321343. The next prime is 51321371. The reversal of 51321364 is 46312315.

It can be written as a sum of positive squares in 2 ways, for example, as 30691600 + 20629764 = 5540^2 + 4542^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3099 + ... + 10594.

Almost surely, 2^51321364 is an apocalyptic number.

It is an amenable number.

51321364 is a deficient number, since it is larger than the sum of its proper divisors (38593440).

51321364 is a wasteful number, since it uses less digits than its factorization.

51321364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14634 (or 14632 counting only the distinct ones).

The product of its digits is 2160, while the sum is 25.

The square root of 51321364 is about 7163.8930756956. The cubic root of 51321364 is about 371.6202719363.

Adding to 51321364 its reverse (46312315), we get a palindrome (97633679).

The spelling of 51321364 in words is "fifty-one million, three hundred twenty-one thousand, three hundred sixty-four".