16815130 has 8 divisors (see below), whose sum is σ = 30267252. Its totient is φ = 6726048.

The previous prime is 16815119. The next prime is 16815137. The reversal of 16815130 is 3151861.

It can be written as a sum of positive squares in 2 ways, for example, as 16378209 + 436921 = 4047^2 + 661^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 16815095 and 16815104.

It is not an unprimeable number, because it can be changed into a prime (16815137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 840747 + ... + 840766.

Almost surely, 2^16815130 is an apocalyptic number.

16815130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16815130 is a deficient number, since it is larger than the sum of its proper divisors (13452122).

16815130 is a wasteful number, since it uses less digits than its factorization.

16815130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1681520.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 16815130 is about 4100.6255620332. The cubic root of 16815130 is about 256.1926954946.

Adding to 16815130 its reverse (3151861), we get a palindrome (19966991).

The spelling of 16815130 in words is "sixteen million, eight hundred fifteen thousand, one hundred thirty".