51603523 has 2 divisors, whose sum is σ = 51603524. Its totient is φ = 51603522.

The previous prime is 51603521. The next prime is 51603553. The reversal of 51603523 is 32530615.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51603523 - 2¹ = 51603521 is a prime.

Together with 51603521, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (51603521) 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, 25801761 + 25801762.

It is an arithmetic number, because the mean of its divisors is an integer number (25801762).

Almost surely, 2^51603523 is an apocalyptic number.

51603523 is a deficient number, since it is larger than the sum of its proper divisors (1).

51603523 is an equidigital number, since it uses as much as digits as its factorization.

51603523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2700, while the sum is 25.

The square root of 51603523 is about 7183.5592153194. The cubic root of 51603523 is about 372.3000695803.

The spelling of 51603523 in words is "fifty-one million, six hundred three thousand, five hundred twenty-three".