51486439 has 2 divisors, whose sum is σ = 51486440. Its totient is φ = 51486438.

The previous prime is 51486427. The next prime is 51486451. The reversal of 51486439 is 93468415.

It is a balanced prime because it is at equal distance from previous prime (51486427) and next prime (51486451).

It is a cyclic number.

It is not a de Polignac number, because 51486439 - 2²¹ = 49389287 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 (51486419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25743219 + 25743220.

It is an arithmetic number, because the mean of its divisors is an integer number (25743220).

Almost surely, 2^51486439 is an apocalyptic number.

51486439 is a deficient number, since it is larger than the sum of its proper divisors (1).

51486439 is an equidigital number, since it uses as much as digits as its factorization.

51486439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 40.

The square root of 51486439 is about 7175.4051453559. The cubic root of 51486439 is about 372.0182839705.

The spelling of 51486439 in words is "fifty-one million, four hundred eighty-six thousand, four hundred thirty-nine".