87319228519 has 32 divisors (see below), whose sum is σ = 96094563840. Its totient is φ = 79012147200.

The previous prime is 87319228463. The next prime is 87319228561. The reversal of 87319228519 is 91582291378.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87319228519 is a prime.

It is a super-2 number, since 2×87319228519² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87319228519.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87319228819) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 48215124 + ... + 48216934.

It is an arithmetic number, because the mean of its divisors is an integer number (3002955120).

Almost surely, 2^87319228519 is an apocalyptic number.

87319228519 is a deficient number, since it is larger than the sum of its proper divisors (8775335321).

87319228519 is a wasteful number, since it uses less digits than its factorization.

87319228519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2871.

The product of its digits is 2177280, while the sum is 55.

The spelling of 87319228519 in words is "eighty-seven billion, three hundred nineteen million, two hundred twenty-eight thousand, five hundred nineteen".