51222505 has 16 divisors (see below), whose sum is σ = 63011520. Its totient is φ = 39961152.

The previous prime is 51222481. The next prime is 51222533. The reversal of 51222505 is 50522215.

It is a cyclic number.

It is not a de Polignac number, because 51222505 - 2⁹ = 51221993 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35131 + ... + 36559.

It is an arithmetic number, because the mean of its divisors is an integer number (3938220).

Almost surely, 2^51222505 is an apocalyptic number.

It is an amenable number.

51222505 is a deficient number, since it is larger than the sum of its proper divisors (11789015).

51222505 is a wasteful number, since it uses less digits than its factorization.

51222505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1608.

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 51222505 is about 7156.9899399119. The cubic root of 51222505 is about 371.3815044262.

The spelling of 51222505 in words is "fifty-one million, two hundred twenty-two thousand, five hundred five".