51989563 has 2 divisors, whose sum is σ = 51989564. Its totient is φ = 51989562.

The previous prime is 51989557. The next prime is 51989579. The reversal of 51989563 is 36598915.

51989563 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 51989563 - 2²¹ = 49892411 is a prime.

It is not a weakly prime, because it can be changed into another prime (51989503) 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, 25994781 + 25994782.

It is an arithmetic number, because the mean of its divisors is an integer number (25994782).

Almost surely, 2^51989563 is an apocalyptic number.

51989563 is a deficient number, since it is larger than the sum of its proper divisors (1).

51989563 is an equidigital number, since it uses as much as digits as its factorization.

51989563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 291600, while the sum is 46.

The square root of 51989563 is about 7210.3788388683. The cubic root of 51989563 is about 373.2261420756.

The spelling of 51989563 in words is "fifty-one million, nine hundred eighty-nine thousand, five hundred sixty-three".