3881551 has 4 divisors (see below), whose sum is σ = 3947400. Its totient is φ = 3815704.

The previous prime is 3881543. The next prime is 3881573. The reversal of 3881551 is 1551883.

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

It is a cyclic number.

It is not a de Polignac number, because 3881551 - 2³ = 3881543 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 (3881351) 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, 32836 + ... + 32953.

It is an arithmetic number, because the mean of its divisors is an integer number (986850).

Almost surely, 2^3881551 is an apocalyptic number.

3881551 is a deficient number, since it is larger than the sum of its proper divisors (65849).

3881551 is an equidigital number, since it uses as much as digits as its factorization.

3881551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65848.

The product of its digits is 4800, while the sum is 31.

The square root of 3881551 is about 1970.1652214979. The cubic root of 3881551 is about 157.1574954093.

The spelling of 3881551 in words is "three million, eight hundred eighty-one thousand, five hundred fifty-one".