51163139 has 2 divisors, whose sum is σ = 51163140. Its totient is φ = 51163138.

The previous prime is 51163129. The next prime is 51163169. The reversal of 51163139 is 93136115.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51163139 - 2⁸ = 51162883 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51163129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25581569 + 25581570.

It is an arithmetic number, because the mean of its divisors is an integer number (25581570).

Almost surely, 2^51163139 is an apocalyptic number.

51163139 is a deficient number, since it is larger than the sum of its proper divisors (1).

51163139 is an equidigital number, since it uses as much as digits as its factorization.

51163139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2430, while the sum is 29.

The square root of 51163139 is about 7152.8413235581. The cubic root of 51163139 is about 371.2379740424.

The spelling of 51163139 in words is "fifty-one million, one hundred sixty-three thousand, one hundred thirty-nine".