51246647 has 2 divisors, whose sum is σ = 51246648. Its totient is φ = 51246646.

The previous prime is 51246641. The next prime is 51246661. The reversal of 51246647 is 74664215.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51246647 - 2¹⁸ = 50984503 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51246641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25623323 + 25623324.

It is an arithmetic number, because the mean of its divisors is an integer number (25623324).

Almost surely, 2^51246647 is an apocalyptic number.

51246647 is a deficient number, since it is larger than the sum of its proper divisors (1).

51246647 is an equidigital number, since it uses as much as digits as its factorization.

51246647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40320, while the sum is 35.

The square root of 51246647 is about 7158.6763441295. The cubic root of 51246647 is about 371.4398413106.

The spelling of 51246647 in words is "fifty-one million, two hundred forty-six thousand, six hundred forty-seven".