3781331 has 4 divisors (see below), whose sum is σ = 3799464. Its totient is φ = 3763200.

The previous prime is 3781313. The next prime is 3781367. The reversal of 3781331 is 1331873.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1331873 = 163 ⋅8171.

It is a cyclic number.

It is not a de Polignac number, because 3781331 - 2¹⁴ = 3764947 is a prime.

It is a super-2 number, since 2×3781331² = 28596928263122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3781331.

It is not an unprimeable number, because it can be changed into a prime (3781301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8750 + ... + 9171.

It is an arithmetic number, because the mean of its divisors is an integer number (949866).

Almost surely, 2^3781331 is an apocalyptic number.

3781331 is a deficient number, since it is larger than the sum of its proper divisors (18133).

3781331 is a wasteful number, since it uses less digits than its factorization.

3781331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18132.

The product of its digits is 1512, while the sum is 26.

The square root of 3781331 is about 1944.5644756603. The cubic root of 3781331 is about 155.7931045334.

The spelling of 3781331 in words is "three million, seven hundred eighty-one thousand, three hundred thirty-one".