51012517 has 2 divisors, whose sum is σ = 51012518. Its totient is φ = 51012516.

The previous prime is 51012509. The next prime is 51012581. The reversal of 51012517 is 71521015.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26894596 + 24117921 = 5186^2 + 4911^2 .

It is a cyclic number.

It is not a de Polignac number, because 51012517 - 2³ = 51012509 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51012617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25506258 + 25506259.

It is an arithmetic number, because the mean of its divisors is an integer number (25506259).

Almost surely, 2^51012517 is an apocalyptic number.

It is an amenable number.

51012517 is a deficient number, since it is larger than the sum of its proper divisors (1).

51012517 is an equidigital number, since it uses as much as digits as its factorization.

51012517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 350, while the sum is 22.

The square root of 51012517 is about 7142.3047400682. The cubic root of 51012517 is about 370.8733132785.

It can be divided in two parts, 51012 and 517, that added together give a square (51529 = 227²).

The spelling of 51012517 in words is "fifty-one million, twelve thousand, five hundred seventeen".