51242339 has 2 divisors, whose sum is σ = 51242340. Its totient is φ = 51242338.

The previous prime is 51242311. The next prime is 51242371. The reversal of 51242339 is 93324215.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51242339 - 2⁸ = 51242083 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51244339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25621169 + 25621170.

It is an arithmetic number, because the mean of its divisors is an integer number (25621170).

Almost surely, 2^51242339 is an apocalyptic number.

51242339 is a deficient number, since it is larger than the sum of its proper divisors (1).

51242339 is an equidigital number, since it uses as much as digits as its factorization.

51242339 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 29.

The square root of 51242339 is about 7158.3754441912. The cubic root of 51242339 is about 371.4294327748.

The spelling of 51242339 in words is "fifty-one million, two hundred forty-two thousand, three hundred thirty-nine".