215205017130 has 32 divisors (see below), whose sum is σ = 573880046400. Its totient is φ = 57388004496.

The previous prime is 215205017047. The next prime is 215205017147. The reversal of 215205017130 is 31710502512.

215205017130 is a `hidden beast` number, since 2 + 1 + 5 + 20 + 501 + 7 + 130 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 215205017094 and 215205017103.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 398527540 + ... + 398528079.

It is an arithmetic number, because the mean of its divisors is an integer number (17933751450).

Almost surely, 2^215205017130 is an apocalyptic number.

215205017130 is an abundant number, since it is smaller than the sum of its proper divisors (358675029270).

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

215205017130 is a wasteful number, since it uses less digits than its factorization.

215205017130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797055635 (or 797055629 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 27.

Adding to 215205017130 its reverse (31710502512), we get a palindrome (246915519642).

The spelling of 215205017130 in words is "two hundred fifteen billion, two hundred five million, seventeen thousand, one hundred thirty".