51436289 has 2 divisors, whose sum is σ = 51436290. Its totient is φ = 51436288.

The previous prime is 51436261. The next prime is 51436309. The reversal of 51436289 is 98263415.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49210225 + 2226064 = 7015^2 + 1492^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51436289 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (51436789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25718144 + 25718145.

It is an arithmetic number, because the mean of its divisors is an integer number (25718145).

Almost surely, 2^51436289 is an apocalyptic number.

It is an amenable number.

51436289 is a deficient number, since it is larger than the sum of its proper divisors (1).

51436289 is an equidigital number, since it uses as much as digits as its factorization.

51436289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 38.

The square root of 51436289 is about 7171.9097177809. The cubic root of 51436289 is about 371.8974574767.

The spelling of 51436289 in words is "fifty-one million, four hundred thirty-six thousand, two hundred eighty-nine".