251211043500089 has 2 divisors, whose sum is σ = 251211043500090. Its totient is φ = 251211043500088.

The previous prime is 251211043500041. The next prime is 251211043500103. The reversal of 251211043500089 is 980005340112152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 243699168491689 + 7511875008400 = 15610867^2 + 2740780^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-251211043500089 is a prime.

It is not a weakly prime, because it can be changed into another prime (251211043500029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125605521750044 + 125605521750045.

It is an arithmetic number, because the mean of its divisors is an integer number (125605521750045).

Almost surely, 2^{251211043500089} is an apocalyptic number.

It is an amenable number.

251211043500089 is a deficient number, since it is larger than the sum of its proper divisors (1).

251211043500089 is an equidigital number, since it uses as much as digits as its factorization.

251211043500089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 86400, while the sum is 41.

The spelling of 251211043500089 in words is "two hundred fifty-one trillion, two hundred eleven billion, forty-three million, five hundred thousand, eighty-nine".