51449746 has 8 divisors (see below), whose sum is σ = 77364540. Its totient is φ = 25661568.

The previous prime is 51449731. The next prime is 51449753. The reversal of 51449746 is 64794415.

It can be written as a sum of positive squares in 2 ways, for example, as 46090521 + 5359225 = 6789^2 + 2315^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 51449699 and 51449708.

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, 30631 + ... + 32266.

Almost surely, 2^51449746 is an apocalyptic number.

51449746 is a deficient number, since it is larger than the sum of its proper divisors (25914794).

51449746 is a wasteful number, since it uses less digits than its factorization.

51449746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63308.

The product of its digits is 120960, while the sum is 40.

The square root of 51449746 is about 7172.8478305343. The cubic root of 51449746 is about 371.9298871601.

The spelling of 51449746 in words is "fifty-one million, four hundred forty-nine thousand, seven hundred forty-six".