51384605 has 4 divisors (see below), whose sum is σ = 61661532. Its totient is φ = 41107680.

The previous prime is 51384589. The next prime is 51384611. The reversal of 51384605 is 50648315.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11303044 + 40081561 = 3362^2 + 6331^2 .

It is not a de Polignac number, because 51384605 - 2⁴ = 51384589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5138456 + ... + 5138465.

It is an arithmetic number, because the mean of its divisors is an integer number (15415383).

Almost surely, 2^51384605 is an apocalyptic number.

It is an amenable number.

51384605 is a deficient number, since it is larger than the sum of its proper divisors (10276927).

51384605 is a wasteful number, since it uses less digits than its factorization.

51384605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10276926.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 51384605 is about 7168.3055877941. The cubic root of 51384605 is about 371.7728529088.

The spelling of 51384605 in words is "fifty-one million, three hundred eighty-four thousand, six hundred five".