51023659 has 2 divisors, whose sum is σ = 51023660. Its totient is φ = 51023658.

The previous prime is 51023657. The next prime is 51023701. The reversal of 51023659 is 95632015.

51023659 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51023659 - 2¹ = 51023657 is a prime.

Together with 51023657, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 51023659.

It is not a weakly prime, because it can be changed into another prime (51023657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25511829 + 25511830.

It is an arithmetic number, because the mean of its divisors is an integer number (25511830).

Almost surely, 2^51023659 is an apocalyptic number.

51023659 is a deficient number, since it is larger than the sum of its proper divisors (1).

51023659 is an equidigital number, since it uses as much as digits as its factorization.

51023659 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8100, while the sum is 31.

The square root of 51023659 is about 7143.0846978039. The cubic root of 51023659 is about 370.9003129895.

The spelling of 51023659 in words is "fifty-one million, twenty-three thousand, six hundred fifty-nine".