881551 has 4 divisors (see below), whose sum is σ = 961704. Its totient is φ = 801400.

The previous prime is 881539. The next prime is 881591. The reversal of 881551 is 155188.

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 881551 - 2¹³ = 873359 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 (881591) 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, 40060 + ... + 40081.

It is an arithmetic number, because the mean of its divisors is an integer number (240426).

2⁸⁸¹⁵⁵¹ is an apocalyptic number.

881551 is a deficient number, since it is larger than the sum of its proper divisors (80153).

881551 is a wasteful number, since it uses less digits than its factorization.

881551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80152.

The product of its digits is 1600, while the sum is 28.

The square root of 881551 is about 938.9094738046. The cubic root of 881551 is about 95.8846632812.

The spelling of 881551 in words is "eight hundred eighty-one thousand, five hundred fifty-one".