51122 has 4 divisors (see below), whose sum is σ = 76686. Its totient is φ = 25560.

The previous prime is 51109. The next prime is 51131. The reversal of 51122 is 22115.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22115 = 5 ⋅4423.

It can be written as a sum of positive squares in only one way, i.e., 36481 + 14641 = 191^2 + 121^2 .

It is a super-2 number, since 2×51122² = 5226917768, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12779 + ... + 12782.

2⁵¹¹²² is an apocalyptic number.

51122 is a deficient number, since it is larger than the sum of its proper divisors (25564).

51122 is a wasteful number, since it uses less digits than its factorization.

51122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25563.

The product of its digits is 20, while the sum is 11.

The square root of 51122 is about 226.1017470078. The cubic root of 51122 is about 37.1138446306.

Adding to 51122 its reverse (22115), we get a palindrome (73237).

The spelling of 51122 in words is "fifty-one thousand, one hundred twenty-two".