51422121 has 10 divisors (see below), whose sum is σ = 76815882. Its totient is φ = 34281360.

The previous prime is 51422117. The next prime is 51422131. The reversal of 51422121 is 12122415.

It can be written as a sum of positive squares in only one way, i.e., 51322896 + 99225 = 7164^2 + 315^2 .

It is not a de Polignac number, because 51422121 - 2² = 51422117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51422094 and 51422103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51422131) 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 in 9 ways as a sum of consecutive naturals, for example, 317340 + ... + 317501.

Almost surely, 2^51422121 is an apocalyptic number.

It is an amenable number.

51422121 is a deficient number, since it is larger than the sum of its proper divisors (25393761).

51422121 is an equidigital number, since it uses as much as digits as its factorization.

51422121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634853 (or 634844 counting only the distinct ones).

The product of its digits is 160, while the sum is 18.

The square root of 51422121 is about 7170.9219072585. The cubic root of 51422121 is about 371.8633082594.

Adding to 51422121 its reverse (12122415), we get a palindrome (63544536).

The spelling of 51422121 in words is "fifty-one million, four hundred twenty-two thousand, one hundred twenty-one".