51405412 has 12 divisors (see below), whose sum is σ = 94694320. Its totient is φ = 24349896.

The previous prime is 51405407. The next prime is 51405413. The reversal of 51405412 is 21450415.

It is not an unprimeable number, because it can be changed into a prime (51405413) 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, 338118 + ... + 338269.

Almost surely, 2^51405412 is an apocalyptic number.

It is an amenable number.

51405412 is a deficient number, since it is larger than the sum of its proper divisors (43288908).

51405412 is a wasteful number, since it uses less digits than its factorization.

51405412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 676410 (or 676408 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 51405412 is about 7169.7567601698. The cubic root of 51405412 is about 371.8230263923.

Adding to 51405412 its reverse (21450415), we get a palindrome (72855827).

The spelling of 51405412 in words is "fifty-one million, four hundred five thousand, four hundred twelve".