51390347 has 2 divisors, whose sum is σ = 51390348. Its totient is φ = 51390346.

The previous prime is 51390331. The next prime is 51390359. The reversal of 51390347 is 74309315.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51390347 - 2⁴ = 51390331 is a prime.

It is not a weakly prime, because it can be changed into another prime (51390377) 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, 25695173 + 25695174.

It is an arithmetic number, because the mean of its divisors is an integer number (25695174).

Almost surely, 2^51390347 is an apocalyptic number.

51390347 is a deficient number, since it is larger than the sum of its proper divisors (1).

51390347 is an equidigital number, since it uses as much as digits as its factorization.

51390347 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11340, while the sum is 32.

The square root of 51390347 is about 7168.7060896650. The cubic root of 51390347 is about 371.7867003781.

The spelling of 51390347 in words is "fifty-one million, three hundred ninety thousand, three hundred forty-seven".