51347887 has 2 divisors, whose sum is σ = 51347888. Its totient is φ = 51347886.

The previous prime is 51347833. The next prime is 51347917. The reversal of 51347887 is 78874315.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51347887 - 2¹¹ = 51345839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51347827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25673943 + 25673944.

It is an arithmetic number, because the mean of its divisors is an integer number (25673944).

Almost surely, 2^51347887 is an apocalyptic number.

51347887 is a deficient number, since it is larger than the sum of its proper divisors (1).

51347887 is an equidigital number, since it uses as much as digits as its factorization.

51347887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 188160, while the sum is 43.

The square root of 51347887 is about 7165.7439948689. The cubic root of 51347887 is about 371.6842789842.

It can be divided in two parts, 513 and 47887, that added together give a square (48400 = 220²).

The spelling of 51347887 in words is "fifty-one million, three hundred forty-seven thousand, eight hundred eighty-seven".