16317481 has 12 divisors (see below), whose sum is σ = 17189452. Its totient is φ = 15477696.

The previous prime is 16317479. The next prime is 16317493. The reversal of 16317481 is 18471361.

It can be written as a sum of positive squares in 6 ways, for example, as 1915456 + 14402025 = 1384^2 + 3795^2 .

It is not a de Polignac number, because 16317481 - 2¹ = 16317479 is a prime.

It is a super-2 number, since 2×16317481² = 532520372370722, which contains 22 as substring.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16317421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 103855 + ... + 104011.

Almost surely, 2^16317481 is an apocalyptic number.

It is an amenable number.

16317481 is a deficient number, since it is larger than the sum of its proper divisors (871971).

16317481 is an equidigital number, since it uses as much as digits as its factorization.

16317481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300 (or 247 counting only the distinct ones).

The product of its digits is 4032, while the sum is 31.

The square root of 16317481 is about 4039.4901906057. The cubic root of 16317481 is about 253.6399770541.

The spelling of 16317481 in words is "sixteen million, three hundred seventeen thousand, four hundred eighty-one".