51122066 has 4 divisors (see below), whose sum is σ = 76683102. Its totient is φ = 25561032.

The previous prime is 51122063. The next prime is 51122117. The reversal of 51122066 is 66022115.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 27258841 + 23863225 = 5221^2 + 4885^2 .

It is a super-2 number, since 2×51122066² = 5226931264216712, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51122063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12780515 + ... + 12780518.

Almost surely, 2^51122066 is an apocalyptic number.

51122066 is a deficient number, since it is larger than the sum of its proper divisors (25561036).

51122066 is a wasteful number, since it uses less digits than its factorization.

51122066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25561035.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 51122066 is about 7149.9696502852. The cubic root of 51122066 is about 371.1386060229.

The spelling of 51122066 in words is "fifty-one million, one hundred twenty-two thousand, sixty-six".