3811345021 has 8 divisors (see below), whose sum is σ = 4194627264. Its totient is φ = 3434195520.

The previous prime is 3811344991. The next prime is 3811345037. The reversal of 3811345021 is 1205431183.

It is a happy number.

3811345021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 3811345021 - 2¹¹ = 3811342973 is a prime.

It is a super-3 number, since 3×3811345021³ (a number of 30 digits) contains 333 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 (3811345081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1531881 + ... + 1534366.

It is an arithmetic number, because the mean of its divisors is an integer number (524328408).

Almost surely, 2^3811345021 is an apocalyptic number.

It is an amenable number.

3811345021 is a deficient number, since it is larger than the sum of its proper divisors (383282243).

3811345021 is a wasteful number, since it uses less digits than its factorization.

3811345021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3066371.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 3811345021 is about 61736.0917211318. The cubic root of 3811345021 is about 1562.0421727326.

The spelling of 3811345021 in words is "three billion, eight hundred eleven million, three hundred forty-five thousand, twenty-one".