3781840213 has 4 divisors (see below), whose sum is σ = 4004301420. Its totient is φ = 3559379008.

The previous prime is 3781840157. The next prime is 3781840229. The reversal of 3781840213 is 3120481873.

3781840213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2350504324 + 1431335889 = 48482^2 + 37833^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3781840213 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 (3781840813) 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, 111230578 + ... + 111230611.

It is an arithmetic number, because the mean of its divisors is an integer number (1001075355).

Almost surely, 2^3781840213 is an apocalyptic number.

It is an amenable number.

3781840213 is a deficient number, since it is larger than the sum of its proper divisors (222461207).

3781840213 is a wasteful number, since it uses less digits than its factorization.

3781840213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222461206.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 3781840213 is about 61496.6683081287. The cubic root of 3781840213 is about 1558.0009751313. Note that the first 3 decimals are identical.

The spelling of 3781840213 in words is "three billion, seven hundred eighty-one million, eight hundred forty thousand, two hundred thirteen".