215344690250 has 16 divisors (see below), whose sum is σ = 403125260616. Its totient is φ = 86137876000.

The previous prime is 215344690243. The next prime is 215344690259. The reversal of 215344690250 is 52096443512.

It can be written as a sum of positive squares in 4 ways, for example, as 20820469849 + 194524220401 = 144293^2 + 441049^2 .

It is a junction number, because it is equal to n+sod(n) for n = 215344690198 and 215344690207.

It is not an unprimeable number, because it can be changed into a prime (215344690259) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 430689131 + ... + 430689630.

Almost surely, 2^215344690250 is an apocalyptic number.

215344690250 is a deficient number, since it is larger than the sum of its proper divisors (187780570366).

215344690250 is an equidigital number, since it uses as much as digits as its factorization.

215344690250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 861378778 (or 861378768 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 41.

The spelling of 215344690250 in words is "two hundred fifteen billion, three hundred forty-four million, six hundred ninety thousand, two hundred fifty".