51225617 has 2 divisors, whose sum is σ = 51225618. Its totient is φ = 51225616.

The previous prime is 51225611. The next prime is 51225637. The reversal of 51225617 is 71652215.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46022656 + 5202961 = 6784^2 + 2281^2 .

It is a cyclic number.

It is not a de Polignac number, because 51225617 - 2¹⁴ = 51209233 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51225617.

It is not a weakly prime, because it can be changed into another prime (51225611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25612808 + 25612809.

It is an arithmetic number, because the mean of its divisors is an integer number (25612809).

Almost surely, 2^51225617 is an apocalyptic number.

It is an amenable number.

51225617 is a deficient number, since it is larger than the sum of its proper divisors (1).

51225617 is an equidigital number, since it uses as much as digits as its factorization.

51225617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4200, while the sum is 29.

The square root of 51225617 is about 7157.2073464446. The cubic root of 51225617 is about 371.3890253121.

The spelling of 51225617 in words is "fifty-one million, two hundred twenty-five thousand, six hundred seventeen".