51122205 has 16 divisors (see below), whose sum is σ = 90884160. Its totient is φ = 27265104.

The previous prime is 51122191. The next prime is 51122231. The reversal of 51122205 is 50222115.

It is not a de Polignac number, because 51122205 - 2⁸ = 51121949 is a prime.

It is a super-2 number, since 2×51122205² = 5226959688124050, which contains 22 as substring.

It is a congruent number.

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, 189207 + ... + 189476.

It is an arithmetic number, because the mean of its divisors is an integer number (5680260).

Almost surely, 2^51122205 is an apocalyptic number.

It is an amenable number.

51122205 is a deficient number, since it is larger than the sum of its proper divisors (39761955).

51122205 is a wasteful number, since it uses less digits than its factorization.

51122205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378697 (or 378691 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 51122205 is about 7149.9793705996. The cubic root of 51122205 is about 371.1389423957.

The spelling of 51122205 in words is "fifty-one million, one hundred twenty-two thousand, two hundred five".