16515012 has 48 divisors (see below), whose sum is σ = 41005440. Its totient is φ = 5161728.

The previous prime is 16514977. The next prime is 16515019. The reversal of 16515012 is 21051561.

It is a self number, because there is not a number n which added to its sum of digits gives 16515012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16515019) 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, 14064 + ... + 15192.

It is an arithmetic number, because the mean of its divisors is an integer number (854280).

Almost surely, 2^16515012 is an apocalyptic number.

16515012 is a gapful number since it is divisible by the number (12) 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 16515012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20502720).

16515012 is an abundant number, since it is smaller than the sum of its proper divisors (24490428).

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

16515012 is a wasteful number, since it uses less digits than its factorization.

16515012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1212 (or 1210 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 21.

The square root of 16515012 is about 4063.8666316699. The cubic root of 16515012 is about 254.6593529083.

Adding to 16515012 its reverse (21051561), we get a palindrome (37566573).

The spelling of 16515012 in words is "sixteen million, five hundred fifteen thousand, twelve".