87221507299 has 2 divisors, whose sum is σ = 87221507300. Its totient is φ = 87221507298.

The previous prime is 87221507287. The next prime is 87221507357. The reversal of 87221507299 is 99270512278.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87221507299 - 2⁵ = 87221507267 is a prime.

It is not a weakly prime, because it can be changed into another prime (87221507599) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43610753649 + 43610753650.

It is an arithmetic number, because the mean of its divisors is an integer number (43610753650).

Almost surely, 2^87221507299 is an apocalyptic number.

87221507299 is a deficient number, since it is larger than the sum of its proper divisors (1).

87221507299 is an equidigital number, since it uses as much as digits as its factorization.

87221507299 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1270080, while the sum is 52.

The spelling of 87221507299 in words is "eighty-seven billion, two hundred twenty-one million, five hundred seven thousand, two hundred ninety-nine".