215023665612550 has 12 divisors (see below), whose sum is σ = 399944018039436. Its totient is φ = 86009466245000.

The previous prime is 215023665612521. The next prime is 215023665612551. The reversal of 215023665612550 is 55216566320512.

It is a junction number, because it is equal to n+sod(n) for n = 215023665612494 and 215023665612503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215023665612551) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2150236656076 + ... + 2150236656175.

It is an arithmetic number, because the mean of its divisors is an integer number (33328668169953).

Almost surely, 2^{215023665612550} is an apocalyptic number.

215023665612550 is a deficient number, since it is larger than the sum of its proper divisors (184920352426886).

215023665612550 is a wasteful number, since it uses less digits than its factorization.

215023665612550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4300473312263 (or 4300473312258 counting only the distinct ones).

The product of its (nonzero) digits is 3240000, while the sum is 49.

The spelling of 215023665612550 in words is "two hundred fifteen trillion, twenty-three billion, six hundred sixty-five million, six hundred twelve thousand, five hundred fifty".