51406736 has 20 divisors (see below), whose sum is σ = 99863772. Its totient is φ = 25635456.

The previous prime is 51406721. The next prime is 51406741. The reversal of 51406736 is 63760415.

It can be written as a sum of positive squares in 2 ways, for example, as 28558336 + 22848400 = 5344^2 + 4780^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2306 + ... + 10398.

Almost surely, 2^51406736 is an apocalyptic number.

It is an amenable number.

51406736 is a deficient number, since it is larger than the sum of its proper divisors (48457036).

51406736 is a wasteful number, since it uses less digits than its factorization.

51406736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8498 (or 8492 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 51406736 is about 7169.8490918568. The cubic root of 51406736 is about 371.8262185948.

The spelling of 51406736 in words is "fifty-one million, four hundred six thousand, seven hundred thirty-six".