51265807 has 2 divisors, whose sum is σ = 51265808. Its totient is φ = 51265806.

The previous prime is 51265793. The next prime is 51265817. The reversal of 51265807 is 70856215.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51265807 - 2²³ = 42877199 is a prime.

It is a super-2 number, since 2×51265807² = 5256365934722498, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51265817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25632903 + 25632904.

It is an arithmetic number, because the mean of its divisors is an integer number (25632904).

Almost surely, 2^51265807 is an apocalyptic number.

51265807 is a deficient number, since it is larger than the sum of its proper divisors (1).

51265807 is an equidigital number, since it uses as much as digits as its factorization.

51265807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16800, while the sum is 34.

The square root of 51265807 is about 7160.0144552927. The cubic root of 51265807 is about 371.4861266192.

The spelling of 51265807 in words is "fifty-one million, two hundred sixty-five thousand, eight hundred seven".