51392387 has 2 divisors, whose sum is σ = 51392388. Its totient is φ = 51392386.

The previous prime is 51392381. The next prime is 51392447. The reversal of 51392387 is 78329315.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51392387 - 2⁶ = 51392323 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51392387.

It is not a weakly prime, because it can be changed into another prime (51392381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25696193 + 25696194.

It is an arithmetic number, because the mean of its divisors is an integer number (25696194).

Almost surely, 2^51392387 is an apocalyptic number.

51392387 is a deficient number, since it is larger than the sum of its proper divisors (1).

51392387 is an equidigital number, since it uses as much as digits as its factorization.

51392387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45360, while the sum is 38.

The square root of 51392387 is about 7168.8483733442. The cubic root of 51392387 is about 371.7916198158.

The spelling of 51392387 in words is "fifty-one million, three hundred ninety-two thousand, three hundred eighty-seven".