51157751 has 2 divisors, whose sum is σ = 51157752. Its totient is φ = 51157750.

The previous prime is 51157739. The next prime is 51157753. The reversal of 51157751 is 15775115.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51157751 - 2¹⁴ = 51141367 is a prime.

Together with 51157753, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51157753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25578875 + 25578876.

It is an arithmetic number, because the mean of its divisors is an integer number (25578876).

Almost surely, 2^51157751 is an apocalyptic number.

51157751 is a deficient number, since it is larger than the sum of its proper divisors (1).

51157751 is an equidigital number, since it uses as much as digits as its factorization.

51157751 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6125, while the sum is 32.

The square root of 51157751 is about 7152.4646800945. The cubic root of 51157751 is about 371.2249418708.

The spelling of 51157751 in words is "fifty-one million, one hundred fifty-seven thousand, seven hundred fifty-one".