51871751 has 2 divisors, whose sum is σ = 51871752. Its totient is φ = 51871750.

The previous prime is 51871733. The next prime is 51871759. The reversal of 51871751 is 15717815.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51871751 - 2¹⁴ = 51855367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51871759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25935875 + 25935876.

It is an arithmetic number, because the mean of its divisors is an integer number (25935876).

Almost surely, 2^51871751 is an apocalyptic number.

51871751 is a deficient number, since it is larger than the sum of its proper divisors (1).

51871751 is an equidigital number, since it uses as much as digits as its factorization.

51871751 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9800, while the sum is 35.

The square root of 51871751 is about 7202.2045930396. The cubic root of 51871751 is about 372.9440099769.

The spelling of 51871751 in words is "fifty-one million, eight hundred seventy-one thousand, seven hundred fifty-one".