51901847 has 2 divisors, whose sum is σ = 51901848. Its totient is φ = 51901846.

The previous prime is 51901841. The next prime is 51901849. The reversal of 51901847 is 74810915.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51901847 - 2⁶ = 51901783 is a prime.

It is a super-2 number, since 2×51901847² = 5387603444022818, which contains 22 as substring.

Together with 51901849, 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 (51901841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25950923 + 25950924.

It is an arithmetic number, because the mean of its divisors is an integer number (25950924).

Almost surely, 2^51901847 is an apocalyptic number.

51901847 is a deficient number, since it is larger than the sum of its proper divisors (1).

51901847 is an equidigital number, since it uses as much as digits as its factorization.

51901847 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 35.

The square root of 51901847 is about 7204.2936503171. The cubic root of 51901847 is about 373.0161234276.

The spelling of 51901847 in words is "fifty-one million, nine hundred one thousand, eight hundred forty-seven".