51043648 has 14 divisors (see below), whose sum is σ = 101289866. Its totient is φ = 25521792.

The previous prime is 51043591. The next prime is 51043651. The reversal of 51043648 is 84634015.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 45050944 + 5992704 = 6712^2 + 2448^2 .

It is a super-2 number, since 2×51043648² = 5210908002295808, 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, 398715 + ... + 398842.

Almost surely, 2^51043648 is an apocalyptic number.

It is an amenable number.

51043648 is a deficient number, since it is larger than the sum of its proper divisors (50246218).

51043648 is an equidigital number, since it uses as much as digits as its factorization.

51043648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797569 (or 797559 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 51043648 is about 7144.4837462199. The cubic root of 51043648 is about 370.9487412321.

The spelling of 51043648 in words is "fifty-one million, forty-three thousand, six hundred forty-eight".