51618089 has 2 divisors, whose sum is σ = 51618090. Its totient is φ = 51618088.

The previous prime is 51618037. The next prime is 51618101. The reversal of 51618089 is 98081615.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50197225 + 1420864 = 7085^2 + 1192^2 .

It is a cyclic number.

It is not a de Polignac number, because 51618089 - 2⁸ = 51617833 is a prime.

It is a super-2 number, since 2×51618089² = 5328854224023842, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51618019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25809044 + 25809045.

It is an arithmetic number, because the mean of its divisors is an integer number (25809045).

Almost surely, 2^51618089 is an apocalyptic number.

It is an amenable number.

51618089 is a deficient number, since it is larger than the sum of its proper divisors (1).

51618089 is an equidigital number, since it uses as much as digits as its factorization.

51618089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 38.

The square root of 51618089 is about 7184.5729866151. The cubic root of 51618089 is about 372.3350956944.

The spelling of 51618089 in words is "fifty-one million, six hundred eighteen thousand, eighty-nine".