51208207 has 2 divisors, whose sum is σ = 51208208. Its totient is φ = 51208206.

The previous prime is 51208153. The next prime is 51208231. The reversal of 51208207 is 70280215.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51208207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51208237) 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, 25604103 + 25604104.

It is an arithmetic number, because the mean of its divisors is an integer number (25604104).

Almost surely, 2^51208207 is an apocalyptic number.

51208207 is a deficient number, since it is larger than the sum of its proper divisors (1).

51208207 is an equidigital number, since it uses as much as digits as its factorization.

51208207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 51208207 is about 7155.9909865790. The cubic root of 51208207 is about 371.3469460038.

It can be divided in two parts, 51208 and 207, that added together give a palindrome (51415).

The spelling of 51208207 in words is "fifty-one million, two hundred eight thousand, two hundred seven".