215087777012 has 12 divisors (see below), whose sum is σ = 376704982500. Its totient is φ = 107457782016.

The previous prime is 215087776973. The next prime is 215087777029. The reversal of 215087777012 is 210777780512.

It can be written as a sum of positive squares in 2 ways, for example, as 47312340196 + 167775436816 = 217514^2 + 409604^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21521003 + ... + 21530994.

It is an arithmetic number, because the mean of its divisors is an integer number (31392081875).

Almost surely, 2^215087777012 is an apocalyptic number.

It is an amenable number.

215087777012 is a deficient number, since it is larger than the sum of its proper divisors (161617205488).

215087777012 is a wasteful number, since it uses less digits than its factorization.

215087777012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43053250 (or 43053248 counting only the distinct ones).

The product of its (nonzero) digits is 384160, while the sum is 47.

The spelling of 215087777012 in words is "two hundred fifteen billion, eighty-seven million, seven hundred seventy-seven thousand, twelve".