51136859 has 2 divisors, whose sum is σ = 51136860. Its totient is φ = 51136858.

The previous prime is 51136823. The next prime is 51136873. The reversal of 51136859 is 95863115.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51136859 is a prime.

It is a super-3 number, since 3×51136859³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51138859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25568429 + 25568430.

It is an arithmetic number, because the mean of its divisors is an integer number (25568430).

Almost surely, 2^51136859 is an apocalyptic number.

51136859 is a deficient number, since it is larger than the sum of its proper divisors (1).

51136859 is an equidigital number, since it uses as much as digits as its factorization.

51136859 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32400, while the sum is 38.

The square root of 51136859 is about 7151.0040553757. The cubic root of 51136859 is about 371.1744008981.

The spelling of 51136859 in words is "fifty-one million, one hundred thirty-six thousand, eight hundred fifty-nine".