51573647 has 2 divisors, whose sum is σ = 51573648. Its totient is φ = 51573646.

The previous prime is 51573607. The next prime is 51573667. The reversal of 51573647 is 74637515.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51573647 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51573647.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51573607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25786823 + 25786824.

It is an arithmetic number, because the mean of its divisors is an integer number (25786824).

Almost surely, 2^51573647 is an apocalyptic number.

51573647 is a deficient number, since it is larger than the sum of its proper divisors (1).

51573647 is an equidigital number, since it uses as much as digits as its factorization.

51573647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 88200, while the sum is 38.

The square root of 51573647 is about 7181.4794436801. The cubic root of 51573647 is about 372.2282076643.

The spelling of 51573647 in words is "fifty-one million, five hundred seventy-three thousand, six hundred forty-seven".