51225637 has 2 divisors, whose sum is σ = 51225638. Its totient is φ = 51225636.

The previous prime is 51225617. The next prime is 51225659. The reversal of 51225637 is 73652215.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40947201 + 10278436 = 6399^2 + 3206^2 .

It is a cyclic number.

It is not a de Polignac number, because 51225637 - 2⁷ = 51225509 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 51225599 and 51225608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51225617) 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, 25612818 + 25612819.

It is an arithmetic number, because the mean of its divisors is an integer number (25612819).

Almost surely, 2^51225637 is an apocalyptic number.

It is an amenable number.

51225637 is a deficient number, since it is larger than the sum of its proper divisors (1).

51225637 is an equidigital number, since it uses as much as digits as its factorization.

51225637 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12600, while the sum is 31.

The square root of 51225637 is about 7157.2087436374. The cubic root of 51225637 is about 371.3890736458.

The spelling of 51225637 in words is "fifty-one million, two hundred twenty-five thousand, six hundred thirty-seven".