51185089 has 2 divisors, whose sum is σ = 51185090. Its totient is φ = 51185088.

The previous prime is 51185081. The next prime is 51185111. The reversal of 51185089 is 98058115.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48650625 + 2534464 = 6975^2 + 1592^2 .

It is a cyclic number.

It is not a de Polignac number, because 51185089 - 2³ = 51185081 is a prime.

It is a Chen prime.

It is equal to p_3067867 and since 51185089 and 3067867 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (51185081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25592544 + 25592545.

It is an arithmetic number, because the mean of its divisors is an integer number (25592545).

Almost surely, 2^51185089 is an apocalyptic number.

It is an amenable number.

51185089 is a deficient number, since it is larger than the sum of its proper divisors (1).

51185089 is an equidigital number, since it uses as much as digits as its factorization.

51185089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400, while the sum is 37.

The square root of 51185089 is about 7154.3755143269. The cubic root of 51185089 is about 371.2910559333.

The spelling of 51185089 in words is "fifty-one million, one hundred eighty-five thousand, eighty-nine".