51862439 has 2 divisors, whose sum is σ = 51862440. Its totient is φ = 51862438.

The previous prime is 51862423. The next prime is 51862471. The reversal of 51862439 is 93426815.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51862439 - 2⁴ = 51862423 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 (51862409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25931219 + 25931220.

It is an arithmetic number, because the mean of its divisors is an integer number (25931220).

Almost surely, 2^51862439 is an apocalyptic number.

51862439 is a deficient number, since it is larger than the sum of its proper divisors (1).

51862439 is an equidigital number, since it uses as much as digits as its factorization.

51862439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 38.

The square root of 51862439 is about 7201.5580953013. The cubic root of 51862439 is about 372.9216917119.

The spelling of 51862439 in words is "fifty-one million, eight hundred sixty-two thousand, four hundred thirty-nine".