21441310315 has 4 divisors (see below), whose sum is σ = 25729572384. Its totient is φ = 17153048248.

The previous prime is 21441310313. The next prime is 21441310337. The reversal of 21441310315 is 51301314412.

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

It is a cyclic number.

It is not a de Polignac number, because 21441310315 - 2¹ = 21441310313 is a prime.

It is a super-3 number, since 3×21441310315³ (a number of 32 digits) contains 333 as substring.

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 21441310315.

It is not an unprimeable number, because it can be changed into a prime (21441310313) 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, 2144131027 + ... + 2144131036.

It is an arithmetic number, because the mean of its divisors is an integer number (6432393096).

Almost surely, 2^21441310315 is an apocalyptic number.

21441310315 is a deficient number, since it is larger than the sum of its proper divisors (4288262069).

21441310315 is an equidigital number, since it uses as much as digits as its factorization.

21441310315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4288262068.

The product of its (nonzero) digits is 1440, while the sum is 25.

Adding to 21441310315 its reverse (51301314412), we get a palindrome (72742624727).

The spelling of 21441310315 in words is "twenty-one billion, four hundred forty-one million, three hundred ten thousand, three hundred fifteen".