51471239 has 2 divisors, whose sum is σ = 51471240. Its totient is φ = 51471238.

The previous prime is 51471227. The next prime is 51471289. The reversal of 51471239 is 93217415.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51471239 - 2⁸ = 51470983 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 (51471289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25735619 + 25735620.

It is an arithmetic number, because the mean of its divisors is an integer number (25735620).

Almost surely, 2^51471239 is an apocalyptic number.

51471239 is a deficient number, since it is larger than the sum of its proper divisors (1).

51471239 is an equidigital number, since it uses as much as digits as its factorization.

51471239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7560, while the sum is 32.

The square root of 51471239 is about 7174.3458935292. The cubic root of 51471239 is about 371.9816708701.

The spelling of 51471239 in words is "fifty-one million, four hundred seventy-one thousand, two hundred thirty-nine".