51242567 has 2 divisors, whose sum is σ = 51242568. Its totient is φ = 51242566.

The previous prime is 51242561. The next prime is 51242591. The reversal of 51242567 is 76524215.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51242567 - 2⁸ = 51242311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51242561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25621283 + 25621284.

It is an arithmetic number, because the mean of its divisors is an integer number (25621284).

Almost surely, 2^51242567 is an apocalyptic number.

51242567 is a deficient number, since it is larger than the sum of its proper divisors (1).

51242567 is an equidigital number, since it uses as much as digits as its factorization.

51242567 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16800, while the sum is 32.

The square root of 51242567 is about 7158.3913695746. The cubic root of 51242567 is about 371.4299836590.

The spelling of 51242567 in words is "fifty-one million, two hundred forty-two thousand, five hundred sixty-seven".