215273849866 has 32 divisors (see below), whose sum is σ = 335308896000. Its totient is φ = 103582248000.

The previous prime is 215273849807. The next prime is 215273849891. The reversal of 215273849866 is 668948372512.

It is a super-2 number, since 2×215273849866² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (61).

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, 22076760 + ... + 22086508.

It is an arithmetic number, because the mean of its divisors is an integer number (10478403000).

Almost surely, 2^215273849866 is an apocalyptic number.

215273849866 is a deficient number, since it is larger than the sum of its proper divisors (120035046134).

215273849866 is a wasteful number, since it uses less digits than its factorization.

215273849866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13710.

The product of its digits is 34836480, while the sum is 61.

The spelling of 215273849866 in words is "two hundred fifteen billion, two hundred seventy-three million, eight hundred forty-nine thousand, eight hundred sixty-six".