51355207 has 2 divisors, whose sum is σ = 51355208. Its totient is φ = 51355206.

The previous prime is 51355153. The next prime is 51355231. The reversal of 51355207 is 70255315.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51355207 is a prime.

It is a Chen prime.

It is equal to p_3077443 and since 51355207 and 3077443 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51355237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25677603 + 25677604.

It is an arithmetic number, because the mean of its divisors is an integer number (25677604).

Almost surely, 2^51355207 is an apocalyptic number.

51355207 is a deficient number, since it is larger than the sum of its proper divisors (1).

51355207 is an equidigital number, since it uses as much as digits as its factorization.

51355207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5250, while the sum is 28.

The square root of 51355207 is about 7166.2547400996. The cubic root of 51355207 is about 371.7019402085.

The spelling of 51355207 in words is "fifty-one million, three hundred fifty-five thousand, two hundred seven".