51707842 has 4 divisors (see below), whose sum is σ = 77561766. Its totient is φ = 25853920.

The previous prime is 51707819. The next prime is 51707869. The reversal of 51707842 is 24870715.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 32706961 + 19000881 = 5719^2 + 4359^2 .

It is a junction number, because it is equal to n+sod(n) for n = 51707798 and 51707807.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12926959 + ... + 12926962.

Almost surely, 2^51707842 is an apocalyptic number.

51707842 is a deficient number, since it is larger than the sum of its proper divisors (25853924).

51707842 is a wasteful number, since it uses less digits than its factorization.

51707842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25853923.

The product of its (nonzero) digits is 15680, while the sum is 34.

The square root of 51707842 is about 7190.8165044034. The cubic root of 51707842 is about 372.5507748753.

The spelling of 51707842 in words is "fifty-one million, seven hundred seven thousand, eight hundred forty-two".