51574639 has 2 divisors, whose sum is σ = 51574640. Its totient is φ = 51574638.

The previous prime is 51574637. The next prime is 51574643. The reversal of 51574639 is 93647515.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51574639 - 2¹ = 51574637 is a prime.

Together with 51574637, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51574637) 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, 25787319 + 25787320.

It is an arithmetic number, because the mean of its divisors is an integer number (25787320).

Almost surely, 2^51574639 is an apocalyptic number.

51574639 is a deficient number, since it is larger than the sum of its proper divisors (1).

51574639 is an equidigital number, since it uses as much as digits as its factorization.

51574639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 113400, while the sum is 40.

The square root of 51574639 is about 7181.5485098967. The cubic root of 51574639 is about 372.2305942062.

The spelling of 51574639 in words is "fifty-one million, five hundred seventy-four thousand, six hundred thirty-nine".