51343751 has 4 divisors (see below), whose sum is σ = 53576112. Its totient is φ = 49111392.

The previous prime is 51343741. The next prime is 51343771. The reversal of 51343751 is 15734315.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15734315 = 5 ⋅3146863.

It is a cyclic number.

It is not a de Polignac number, because 51343751 - 2¹⁸ = 51081607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51343711) 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, 1116146 + ... + 1116191.

It is an arithmetic number, because the mean of its divisors is an integer number (13394028).

Almost surely, 2^51343751 is an apocalyptic number.

51343751 is a deficient number, since it is larger than the sum of its proper divisors (2232361).

51343751 is a wasteful number, since it uses less digits than its factorization.

51343751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2232360.

The product of its digits is 6300, while the sum is 29.

The square root of 51343751 is about 7165.4553937625. The cubic root of 51343751 is about 371.6742991678.

The spelling of 51343751 in words is "fifty-one million, three hundred forty-three thousand, seven hundred fifty-one".