87221507313 has 4 divisors (see below), whose sum is σ = 116295343088. Its totient is φ = 58147671540.

The previous prime is 87221507299. The next prime is 87221507357. The reversal of 87221507313 is 31370512278.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 87221507313 - 2¹³ = 87221499121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87221507213) 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 in 3 ways as a sum of consecutive naturals, for example, 14536917883 + ... + 14536917888.

It is an arithmetic number, because the mean of its divisors is an integer number (29073835772).

Almost surely, 2^87221507313 is an apocalyptic number.

It is an amenable number.

87221507313 is a deficient number, since it is larger than the sum of its proper divisors (29073835775).

87221507313 is a wasteful number, since it uses less digits than its factorization.

87221507313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29073835774.

The product of its (nonzero) digits is 70560, while the sum is 39.

The spelling of 87221507313 in words is "eighty-seven billion, two hundred twenty-one million, five hundred seven thousand, three hundred thirteen".