51115222 has 8 divisors (see below), whose sum is σ = 76705272. Its totient is φ = 25546800.

The previous prime is 51115199. The next prime is 51115231. The reversal of 51115222 is 22251115.

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

It is a super-2 number, since 2×51115222² = 5225531840218568, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51115222.

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, 3322 + ... + 10642.

It is an arithmetic number, because the mean of its divisors is an integer number (9588159).

Almost surely, 2^51115222 is an apocalyptic number.

51115222 is a deficient number, since it is larger than the sum of its proper divisors (25590050).

51115222 is a wasteful number, since it uses less digits than its factorization.

51115222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10814.

The product of its digits is 200, while the sum is 19.

The square root of 51115222 is about 7149.4910308357. The cubic root of 51115222 is about 371.1220431426.

Adding to 51115222 its reverse (22251115), we get a palindrome (73366337).

The spelling of 51115222 in words is "fifty-one million, one hundred fifteen thousand, two hundred twenty-two".