51225469 has 2 divisors, whose sum is σ = 51225470. Its totient is φ = 51225468.

The previous prime is 51225467. The next prime is 51225491. The reversal of 51225469 is 96452215.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34928100 + 16297369 = 5910^2 + 4037^2 .

It is a cyclic number.

It is not a de Polignac number, because 51225469 - 2¹ = 51225467 is a prime.

It is a super-2 number, since 2×51225469² = 5248097348539922, which contains 22 as substring.

Together with 51225467, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51225467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25612734 + 25612735.

It is an arithmetic number, because the mean of its divisors is an integer number (25612735).

Almost surely, 2^51225469 is an apocalyptic number.

It is an amenable number.

51225469 is a deficient number, since it is larger than the sum of its proper divisors (1).

51225469 is an equidigital number, since it uses as much as digits as its factorization.

51225469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21600, while the sum is 34.

The square root of 51225469 is about 7157.1970072089. The cubic root of 51225469 is about 371.3886676419.

The spelling of 51225469 in words is "fifty-one million, two hundred twenty-five thousand, four hundred sixty-nine".