51855701 has 2 divisors, whose sum is σ = 51855702. Its totient is φ = 51855700.

The previous prime is 51855697. The next prime is 51855703. The reversal of 51855701 is 10755815.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42915601 + 8940100 = 6551^2 + 2990^2 .

It is a cyclic number.

It is not a de Polignac number, because 51855701 - 2² = 51855697 is a prime.

It is a Sophie Germain prime.

Together with 51855703, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51855703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25927850 + 25927851.

It is an arithmetic number, because the mean of its divisors is an integer number (25927851).

Almost surely, 2^51855701 is an apocalyptic number.

It is an amenable number.

51855701 is a deficient number, since it is larger than the sum of its proper divisors (1).

51855701 is an equidigital number, since it uses as much as digits as its factorization.

51855701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7000, while the sum is 32.

The square root of 51855701 is about 7201.0902646752. The cubic root of 51855701 is about 372.9055409405.

The spelling of 51855701 in words is "fifty-one million, eight hundred fifty-five thousand, seven hundred one".