215212003361 has 4 divisors (see below), whose sum is σ = 219272607252. Its totient is φ = 211151399472.

The previous prime is 215212003301. The next prime is 215212003379. The reversal of 215212003361 is 163300212512.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 104551989025 + 110660014336 = 323345^2 + 332656^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-215212003361 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 215212003361.

It is not an unprimeable number, because it can be changed into a prime (215212003301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2030301866 + ... + 2030301971.

It is an arithmetic number, because the mean of its divisors is an integer number (54818151813).

Almost surely, 2^215212003361 is an apocalyptic number.

It is an amenable number.

215212003361 is a deficient number, since it is larger than the sum of its proper divisors (4060603891).

215212003361 is an equidigital number, since it uses as much as digits as its factorization.

215212003361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4060603890.

The product of its (nonzero) digits is 2160, while the sum is 26.

Adding to 215212003361 its reverse (163300212512), we get a palindrome (378512215873).

The spelling of 215212003361 in words is "two hundred fifteen billion, two hundred twelve million, three thousand, three hundred sixty-one".