51405017 has 2 divisors, whose sum is σ = 51405018. Its totient is φ = 51405016.

The previous prime is 51405007. The next prime is 51405049. The reversal of 51405017 is 71050415.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27237961 + 24167056 = 5219^2 + 4916^2 .

It is a cyclic number.

It is not a de Polignac number, because 51405017 - 2⁶ = 51404953 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 51404983 and 51405001.

It is not a weakly prime, because it can be changed into another prime (51405007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25702508 + 25702509.

It is an arithmetic number, because the mean of its divisors is an integer number (25702509).

Almost surely, 2^51405017 is an apocalyptic number.

It is an amenable number.

51405017 is a deficient number, since it is larger than the sum of its proper divisors (1).

51405017 is an equidigital number, since it uses as much as digits as its factorization.

51405017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 700, while the sum is 23.

The square root of 51405017 is about 7169.7292138546. The cubic root of 51405017 is about 371.8220740252.

The spelling of 51405017 in words is "fifty-one million, four hundred five thousand, seventeen".