87238722783281 has 2 divisors, whose sum is σ = 87238722783282. Its totient is φ = 87238722783280.

The previous prime is 87238722783221. The next prime is 87238722783367. The reversal of 87238722783281 is 18238722783278.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86127773055025 + 1110949728256 = 9280505^2 + 1054016^2 .

It is a cyclic number.

It is not a de Polignac number, because 87238722783281 - 2³⁴ = 87221542914097 is a prime.

It is a super-2 number, since 2×87238722783281² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (87238722783221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43619361391640 + 43619361391641.

It is an arithmetic number, because the mean of its divisors is an integer number (43619361391641).

Almost surely, 2^{87238722783281} is an apocalyptic number.

It is an amenable number.

87238722783281 is a deficient number, since it is larger than the sum of its proper divisors (1).

87238722783281 is an equidigital number, since it uses as much as digits as its factorization.

87238722783281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 202309632, while the sum is 68.

The spelling of 87238722783281 in words is "eighty-seven trillion, two hundred thirty-eight billion, seven hundred twenty-two million, seven hundred eighty-three thousand, two hundred eighty-one".