51172007 has 2 divisors, whose sum is σ = 51172008. Its totient is φ = 51172006.

The previous prime is 51172003. The next prime is 51172019. The reversal of 51172007 is 70027115.

It is a happy number.

51172007 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51172007 - 2² = 51172003 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51172003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25586003 + 25586004.

It is an arithmetic number, because the mean of its divisors is an integer number (25586004).

Almost surely, 2^51172007 is an apocalyptic number.

51172007 is a deficient number, since it is larger than the sum of its proper divisors (1).

51172007 is an equidigital number, since it uses as much as digits as its factorization.

51172007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 490, while the sum is 23.

The square root of 51172007 is about 7153.4611902211. The cubic root of 51172007 is about 371.2594214375.

The spelling of 51172007 in words is "fifty-one million, one hundred seventy-two thousand, seven".