51350239 has 2 divisors, whose sum is σ = 51350240. Its totient is φ = 51350238.

The previous prime is 51350231. The next prime is 51350287. The reversal of 51350239 is 93205315.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51350239 - 2³ = 51350231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51350231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25675119 + 25675120.

It is an arithmetic number, because the mean of its divisors is an integer number (25675120).

Almost surely, 2^51350239 is an apocalyptic number.

51350239 is a deficient number, since it is larger than the sum of its proper divisors (1).

51350239 is an equidigital number, since it uses as much as digits as its factorization.

51350239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4050, while the sum is 28.

The square root of 51350239 is about 7165.9081071418. The cubic root of 51350239 is about 371.6899539213.

It can be divided in two parts, 5 and 1350239, that added together give a square (1350244 = 1162²).

The spelling of 51350239 in words is "fifty-one million, three hundred fifty thousand, two hundred thirty-nine".