51569983 has 2 divisors, whose sum is σ = 51569984. Its totient is φ = 51569982.

The previous prime is 51569941. The next prime is 51569989. The reversal of 51569983 is 38996515.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51569983 - 2¹⁷ = 51438911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51569989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25784991 + 25784992.

It is an arithmetic number, because the mean of its divisors is an integer number (25784992).

Almost surely, 2^51569983 is an apocalyptic number.

51569983 is a deficient number, since it is larger than the sum of its proper divisors (1).

51569983 is an equidigital number, since it uses as much as digits as its factorization.

51569983 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 51569983 is about 7181.2243385094. The cubic root of 51569983 is about 372.2193925909.

The spelling of 51569983 in words is "fifty-one million, five hundred sixty-nine thousand, nine hundred eighty-three".