51260239 has 2 divisors, whose sum is σ = 51260240. Its totient is φ = 51260238.

The previous prime is 51260213. The next prime is 51260249. The reversal of 51260239 is 93206215.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51260239 - 2¹⁷ = 51129167 is a prime.

It is a super-2 number, since 2×51260239² = 5255224204674242, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51260249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25630119 + 25630120.

It is an arithmetic number, because the mean of its divisors is an integer number (25630120).

Almost surely, 2^51260239 is an apocalyptic number.

51260239 is a deficient number, since it is larger than the sum of its proper divisors (1).

51260239 is an equidigital number, since it uses as much as digits as its factorization.

51260239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 51260239 is about 7159.6256187038. The cubic root of 51260239 is about 371.4726770462.

The spelling of 51260239 in words is "fifty-one million, two hundred sixty thousand, two hundred thirty-nine".