16261813 has 6 divisors (see below), whose sum is σ = 16454594. Its totient is φ = 16071264.

The previous prime is 16261811. The next prime is 16261823. The reversal of 16261813 is 31816261.

16261813 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 77284 + 16184529 = 278^2 + 4023^2 .

It is not a de Polignac number, because 16261813 - 2¹ = 16261811 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16261811) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6895 + ... + 8947.

Almost surely, 2^16261813 is an apocalyptic number.

It is an amenable number.

16261813 is a deficient number, since it is larger than the sum of its proper divisors (192781).

16261813 is an frugal number, since it uses more digits than its factorization.

16261813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2231 (or 2142 counting only the distinct ones).

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

The square root of 16261813 is about 4032.5938302785. The cubic root of 16261813 is about 253.3512127655.

The spelling of 16261813 in words is "sixteen million, two hundred sixty-one thousand, eight hundred thirteen".