13315616 has 36 divisors (see below), whose sum is σ = 27150606. Its totient is φ = 6428160.

The previous prime is 13315613. The next prime is 13315619. The reversal of 13315616 is 61651331.

It is an interprime number because it is at equal distance from previous prime (13315613) and next prime (13315619).

It can be written as a sum of positive squares in only one way, i.e., 12931216 + 384400 = 3596^2 + 620^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13315613) 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, 30536 + ... + 30968.

Almost surely, 2^13315616 is an apocalyptic number.

13315616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13315616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13575303).

13315616 is an abundant number, since it is smaller than the sum of its proper divisors (13834990).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13315616 is an equidigital number, since it uses as much as digits as its factorization.

13315616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505 (or 466 counting only the distinct ones).

The product of its digits is 1620, while the sum is 26.

The square root of 13315616 is about 3649.0568644514. The cubic root of 13315616 is about 237.0211426360.

Adding to 13315616 its reverse (61651331), we get a palindrome (74966947).

It can be divided in two parts, 13315 and 616, that added together give a palindrome (13931).

The spelling of 13315616 in words is "thirteen million, three hundred fifteen thousand, six hundred sixteen".