51867968 has 14 divisors (see below), whose sum is σ = 102925626. Its totient is φ = 25933952.

The previous prime is 51867947. The next prime is 51867971. The reversal of 51867968 is 86976815.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 41576704 + 10291264 = 6448^2 + 3208^2 .

It is a super-2 number, since 2×51867968² = 5380572208898048, which contains 22 as substring.

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 as a sum of consecutive naturals, namely, 405155 + ... + 405282.

Almost surely, 2^51867968 is an apocalyptic number.

It is an amenable number.

51867968 is a deficient number, since it is larger than the sum of its proper divisors (51057658).

51867968 is an equidigital number, since it uses as much as digits as its factorization.

51867968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 810449 (or 810439 counting only the distinct ones).

The product of its digits is 725760, while the sum is 50.

The square root of 51867968 is about 7201.9419603326. The cubic root of 51867968 is about 372.9349435039.

It can be divided in two parts, 518 and 67968, that added together give a palindrome (68486).

The spelling of 51867968 in words is "fifty-one million, eight hundred sixty-seven thousand, nine hundred sixty-eight".