287122241881 has 2 divisors, whose sum is σ = 287122241882. Its totient is φ = 287122241880.

The previous prime is 287122241779. The next prime is 287122241891. The reversal of 287122241881 is 188142221782.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 238159616256 + 48962625625 = 488016^2 + 221275^2 .

It is a cyclic number.

It is not a de Polignac number, because 287122241881 - 2¹³ = 287122233689 is a prime.

It is a super-2 number, since 2×287122241881² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (287122241891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 143561120940 + 143561120941.

It is an arithmetic number, because the mean of its divisors is an integer number (143561120941).

Almost surely, 2^287122241881 is an apocalyptic number.

It is an amenable number.

287122241881 is a deficient number, since it is larger than the sum of its proper divisors (1).

287122241881 is an equidigital number, since it uses as much as digits as its factorization.

287122241881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 229376, while the sum is 46.

The spelling of 287122241881 in words is "two hundred eighty-seven billion, one hundred twenty-two million, two hundred forty-one thousand, eight hundred eighty-one".