51405673 has 8 divisors (see below), whose sum is σ = 56131776. Its totient is φ = 46688400.

The previous prime is 51405647. The next prime is 51405701. The reversal of 51405673 is 37650415.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51405673 - 2¹³ = 51397481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51405623) 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 in 7 ways as a sum of consecutive naturals, for example, 18303 + ... + 20923.

It is an arithmetic number, because the mean of its divisors is an integer number (7016472).

Almost surely, 2^51405673 is an apocalyptic number.

It is an amenable number.

51405673 is a deficient number, since it is larger than the sum of its proper divisors (4726103).

51405673 is a wasteful number, since it uses less digits than its factorization.

51405673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4415.

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 51405673 is about 7169.7749616010. The cubic root of 51405673 is about 371.8236556752.

The spelling of 51405673 in words is "fifty-one million, four hundred five thousand, six hundred seventy-three".