2175800234981 has 2 divisors, whose sum is σ = 2175800234982. Its totient is φ = 2175800234980.

The previous prime is 2175800234977. The next prime is 2175800235001. The reversal of 2175800234981 is 1894320085712.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2035444356100 + 140355878881 = 1426690^2 + 374641^2 .

It is a cyclic number.

It is not a de Polignac number, because 2175800234981 - 2² = 2175800234977 is a prime.

It is a super-2 number, since 2×2175800234981² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2175800834981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1087900117490 + 1087900117491.

It is an arithmetic number, because the mean of its divisors is an integer number (1087900117491).

Almost surely, 2^{2175800234981} is an apocalyptic number.

It is an amenable number.

2175800234981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2175800234981 is an equidigital number, since it uses as much as digits as its factorization.

2175800234981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 967680, while the sum is 50.

The spelling of 2175800234981 in words is "two trillion, one hundred seventy-five billion, eight hundred million, two hundred thirty-four thousand, nine hundred eighty-one".