51022481 has 2 divisors, whose sum is σ = 51022482. Its totient is φ = 51022480.

The previous prime is 51022459. The next prime is 51022483. The reversal of 51022481 is 18422015.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38241856 + 12780625 = 6184^2 + 3575^2 .

It is a cyclic number.

It is not a de Polignac number, because 51022481 - 2⁶ = 51022417 is a prime.

It is a super-2 number, since 2×51022481² = 5206587134790722, which contains 22 as substring.

Together with 51022483, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51022483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25511240 + 25511241.

It is an arithmetic number, because the mean of its divisors is an integer number (25511241).

Almost surely, 2^51022481 is an apocalyptic number.

It is an amenable number.

51022481 is a deficient number, since it is larger than the sum of its proper divisors (1).

51022481 is an equidigital number, since it uses as much as digits as its factorization.

51022481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 51022481 is about 7143.0022399548. The cubic root of 51022481 is about 370.8974586017.

Adding to 51022481 its reverse (18422015), we get a palindrome (69444496).

The spelling of 51022481 in words is "fifty-one million, twenty-two thousand, four hundred eighty-one".