215086117540 has 96 divisors (see below), whose sum is σ = 517702558464. Its totient is φ = 73530478080.

The previous prime is 215086117513. The next prime is 215086117591. The reversal of 215086117540 is 45711680512.

It is a junction number, because it is equal to n+sod(n) for n = 215086117493 and 215086117502.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 131389602 + ... + 131391238.

It is an arithmetic number, because the mean of its divisors is an integer number (5392734984).

Almost surely, 2^215086117540 is an apocalyptic number.

215086117540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215086117540 is an abundant number, since it is smaller than the sum of its proper divisors (302616440924).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

215086117540 is a wasteful number, since it uses less digits than its factorization.

215086117540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3797 (or 3795 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 40.

The spelling of 215086117540 in words is "two hundred fifteen billion, eighty-six million, one hundred seventeen thousand, five hundred forty".