51989503 has 2 divisors, whose sum is σ = 51989504. Its totient is φ = 51989502.

The previous prime is 51989471. The next prime is 51989513. The reversal of 51989503 is 30598915.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51989503 - 2⁵ = 51989471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51989513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25994751 + 25994752.

It is an arithmetic number, because the mean of its divisors is an integer number (25994752).

Almost surely, 2^51989503 is an apocalyptic number.

51989503 is a deficient number, since it is larger than the sum of its proper divisors (1).

51989503 is an equidigital number, since it uses as much as digits as its factorization.

51989503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48600, while the sum is 40.

The square root of 51989503 is about 7210.3746781981. The cubic root of 51989503 is about 373.2259984982.

The spelling of 51989503 in words is "fifty-one million, nine hundred eighty-nine thousand, five hundred three".