287270549021 has 2 divisors, whose sum is σ = 287270549022. Its totient is φ = 287270549020.

The previous prime is 287270548951. The next prime is 287270549107. The reversal of 287270549021 is 120945072782.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 280623408121 + 6647140900 = 529739^2 + 81530^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-287270549021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (287270545021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 143635274510 + 143635274511.

It is an arithmetic number, because the mean of its divisors is an integer number (143635274511).

Almost surely, 2^287270549021 is an apocalyptic number.

It is an amenable number.

287270549021 is a deficient number, since it is larger than the sum of its proper divisors (1).

287270549021 is an equidigital number, since it uses as much as digits as its factorization.

287270549021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 564480, while the sum is 47.

The spelling of 287270549021 in words is "two hundred eighty-seven billion, two hundred seventy million, five hundred forty-nine thousand, twenty-one".