51420122 has 8 divisors (see below), whose sum is σ = 83063316. Its totient is φ = 23732352.

The previous prime is 51420119. The next prime is 51420139. The reversal of 51420122 is 22102415.

51420122 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 37589161 + 13830961 = 6131^2 + 3719^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 51420122.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 988823 + ... + 988874.

Almost surely, 2^51420122 is an apocalyptic number.

51420122 is a deficient number, since it is larger than the sum of its proper divisors (31643194).

51420122 is a wasteful number, since it uses less digits than its factorization.

51420122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1977712.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 51420122 is about 7170.7825235465. The cubic root of 51420122 is about 371.8584895525.

Adding to 51420122 its reverse (22102415), we get a palindrome (73522537).

The spelling of 51420122 in words is "fifty-one million, four hundred twenty thousand, one hundred twenty-two".