51751643 has 2 divisors, whose sum is σ = 51751644. Its totient is φ = 51751642.

The previous prime is 51751619. The next prime is 51751669. The reversal of 51751643 is 34615715.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51751643 - 2²⁰ = 50703067 is a prime.

It is not a weakly prime, because it can be changed into another prime (51721643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25875821 + 25875822.

It is an arithmetic number, because the mean of its divisors is an integer number (25875822).

Almost surely, 2^51751643 is an apocalyptic number.

51751643 is a deficient number, since it is larger than the sum of its proper divisors (1).

51751643 is an equidigital number, since it uses as much as digits as its factorization.

51751643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12600, while the sum is 32.

The square root of 51751643 is about 7193.8614804568. The cubic root of 51751643 is about 372.6559393946.

The spelling of 51751643 in words is "fifty-one million, seven hundred fifty-one thousand, six hundred forty-three".