215273640218340 has 96 divisors (see below), whose sum is σ = 662997525402240. Its totient is φ = 52187549124480.

The previous prime is 215273640218339. The next prime is 215273640218407. The reversal of 215273640218340 is 43812046372512.

It is a self number, because there is not a number n which added to its sum of digits gives 215273640218340.

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, 1347739075 + ... + 1347898794.

It is an arithmetic number, because the mean of its divisors is an integer number (6906224222940).

Almost surely, 2^{215273640218340} is an apocalyptic number.

215273640218340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215273640218340 is an abundant number, since it is smaller than the sum of its proper divisors (447723885183900).

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

215273640218340 is a wasteful number, since it uses less digits than its factorization.

215273640218340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2695637914 (or 2695637890 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 48.

The spelling of 215273640218340 in words is "two hundred fifteen trillion, two hundred seventy-three billion, six hundred forty million, two hundred eighteen thousand, three hundred forty".