51814505 has 4 divisors (see below), whose sum is σ = 62177412. Its totient is φ = 41451600.

The previous prime is 51814489. The next prime is 51814513. The reversal of 51814505 is 50541815.

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 23309584 + 28504921 = 4828^2 + 5339^2 .

It is not a de Polignac number, because 51814505 - 2⁴ = 51814489 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 5181446 + ... + 5181455.

It is an arithmetic number, because the mean of its divisors is an integer number (15544353).

Almost surely, 2^51814505 is an apocalyptic number.

It is an amenable number.

51814505 is a deficient number, since it is larger than the sum of its proper divisors (10362907).

51814505 is a wasteful number, since it uses less digits than its factorization.

51814505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10362906.

The product of its (nonzero) digits is 4000, while the sum is 29.

The square root of 51814505 is about 7198.2292961533. The cubic root of 51814505 is about 372.8067650023.

The spelling of 51814505 in words is "fifty-one million, eight hundred fourteen thousand, five hundred five".