16315516 has 48 divisors (see below), whose sum is σ = 34352640. Its totient is φ = 6632640.

The previous prime is 16315511. The next prime is 16315531. The reversal of 16315516 is 61551361.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16315511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57511 + ... + 57793.

It is an arithmetic number, because the mean of its divisors is an integer number (715680).

Almost surely, 2^16315516 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16315516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17176320).

16315516 is an abundant number, since it is smaller than the sum of its proper divisors (18037124).

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

16315516 is a wasteful number, since it uses less digits than its factorization.

16315516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394 (or 392 counting only the distinct ones).

The product of its digits is 2700, while the sum is 28.

The square root of 16315516 is about 4039.2469595210. The cubic root of 16315516 is about 253.6297952832.

Adding to 16315516 its reverse (61551361), we get a palindrome (77866877).

The spelling of 16315516 in words is "sixteen million, three hundred fifteen thousand, five hundred sixteen".