51222111 has 8 divisors (see below), whose sum is σ = 69000624. Its totient is φ = 33795840.

The previous prime is 51222107. The next prime is 51222113. The reversal of 51222111 is 11122215.

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

It is not a de Polignac number, because 51222111 - 2² = 51222107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51222113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87720 + ... + 88301.

It is an arithmetic number, because the mean of its divisors is an integer number (8625078).

Almost surely, 2^51222111 is an apocalyptic number.

51222111 is a deficient number, since it is larger than the sum of its proper divisors (17778513).

51222111 is a wasteful number, since it uses less digits than its factorization.

51222111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176121.

The product of its digits is 40, while the sum is 15.

The square root of 51222111 is about 7156.9624143208. The cubic root of 51222111 is about 371.3805522101.

Adding to 51222111 its reverse (11122215), we get a palindrome (62344326).

The spelling of 51222111 in words is "fifty-one million, two hundred twenty-two thousand, one hundred eleven".