51030647 has 2 divisors, whose sum is σ = 51030648. Its totient is φ = 51030646.

The previous prime is 51030643. The next prime is 51030649. The reversal of 51030647 is 74603015.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51030647 - 2² = 51030643 is a prime.

Together with 51030649, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51030643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25515323 + 25515324.

It is an arithmetic number, because the mean of its divisors is an integer number (25515324).

Almost surely, 2^51030647 is an apocalyptic number.

51030647 is a deficient number, since it is larger than the sum of its proper divisors (1).

51030647 is an equidigital number, since it uses as much as digits as its factorization.

51030647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 51030647 is about 7143.5738254742. The cubic root of 51030647 is about 370.9172445667.

The spelling of 51030647 in words is "fifty-one million, thirty thousand, six hundred forty-seven".