16513131 has 8 divisors (see below), whose sum is σ = 22130064. Its totient is φ = 10952480.

The previous prime is 16513129. The next prime is 16513139. The reversal of 16513131 is 13131561.

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

It is a cyclic number.

It is not a de Polignac number, because 16513131 - 2¹ = 16513129 is a prime.

It is a super-2 number, since 2×16513131² = 545366990846322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16513098 and 16513107.

It is not an unprimeable number, because it can be changed into a prime (16513139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13380 + ... + 14561.

It is an arithmetic number, because the mean of its divisors is an integer number (2766258).

Almost surely, 2^16513131 is an apocalyptic number.

16513131 is a deficient number, since it is larger than the sum of its proper divisors (5616933).

16513131 is a wasteful number, since it uses less digits than its factorization.

16513131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28141.

The product of its digits is 270, while the sum is 21.

The square root of 16513131 is about 4063.6351952408. The cubic root of 16513131 is about 254.6496842822.

Adding to 16513131 its reverse (13131561), we get a palindrome (29644692).

The spelling of 16513131 in words is "sixteen million, five hundred thirteen thousand, one hundred thirty-one".