215130100000 has 72 divisors (see below), whose sum is σ = 529388093556. Its totient is φ = 86052000000.

The previous prime is 215130099967. The next prime is 215130100001. The reversal of 215130100000 is 1031512.

It can be written as a sum of positive squares in 6 ways, for example, as 56512700176 + 158617399824 = 237724^2 + 398268^2 .

It is not an unprimeable number, because it can be changed into a prime (215130100001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 975651 + ... + 1175650.

Almost surely, 2^215130100000 is an apocalyptic number.

215130100000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215130100000 is an abundant number, since it is smaller than the sum of its proper divisors (314257993556).

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

215130100000 is an frugal number, since it uses more digits than its factorization.

215130100000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2151336 (or 2151308 counting only the distinct ones).

The product of its (nonzero) digits is 30, while the sum is 13.

Adding to 215130100000 its reverse (1031512), we get a palindrome (215131131512).

The spelling of 215130100000 in words is "two hundred fifteen billion, one hundred thirty million, one hundred thousand".