16312861 has 4 divisors (see below), whose sum is σ = 16321500. Its totient is φ = 16304224.

The previous prime is 16312841. The next prime is 16312871. The reversal of 16312861 is 16821361.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 16821361 = 83 ⋅202667.

It can be written as a sum of positive squares in 2 ways, for example, as 7868025 + 8444836 = 2805^2 + 2906^2 .

It is a cyclic number.

It is not a de Polignac number, because 16312861 - 2⁹ = 16312349 is a prime.

It is a super-2 number, since 2×16312861² = 532218868010642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16312841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136 + ... + 5713.

It is an arithmetic number, because the mean of its divisors is an integer number (4080375).

Almost surely, 2^16312861 is an apocalyptic number.

It is an amenable number.

16312861 is a deficient number, since it is larger than the sum of its proper divisors (8639).

16312861 is an equidigital number, since it uses as much as digits as its factorization.

16312861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8638.

The product of its digits is 1728, while the sum is 28.

The square root of 16312861 is about 4038.9182957817. The cubic root of 16312861 is about 253.6160369353.

The spelling of 16312861 in words is "sixteen million, three hundred twelve thousand, eight hundred sixty-one".