51321160 has 32 divisors (see below), whose sum is σ = 125971200. Its totient is φ = 18662080.

The previous prime is 51321157. The next prime is 51321169. The reversal of 51321160 is 6112315.

It is a super-2 number, since 2×51321160² = 5267722927491200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51321169) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 57880 + ... + 58759.

It is an arithmetic number, because the mean of its divisors is an integer number (3936600).

Almost surely, 2^51321160 is an apocalyptic number.

It is an amenable number.

51321160 is an abundant number, since it is smaller than the sum of its proper divisors (74650040).

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

51321160 is a wasteful number, since it uses less digits than its factorization.

51321160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116661 (or 116657 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 51321160 is about 7163.8788376130. The cubic root of 51321160 is about 371.6197795447.

Adding to 51321160 its reverse (6112315), we get a palindrome (57433475).

The spelling of 51321160 in words is "fifty-one million, three hundred twenty-one thousand, one hundred sixty".