988551 has 32 divisors (see below), whose sum is σ = 1612800. Its totient is φ = 596160.

The previous prime is 988549. The next prime is 988571. The reversal of 988551 is 155889.

It is not a de Polignac number, because 988551 - 2¹ = 988549 is a prime.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (988501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21010 + ... + 21056.

It is an arithmetic number, because the mean of its divisors is an integer number (50400).

2⁹⁸⁸⁵⁵¹ is an apocalyptic number.

988551 is a deficient number, since it is larger than the sum of its proper divisors (624249).

988551 is a wasteful number, since it uses less digits than its factorization.

988551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116 (or 110 counting only the distinct ones).

The product of its digits is 14400, while the sum is 36.

The square root of 988551 is about 994.2590205776. The cubic root of 988551 is about 99.6169008916.

It can be divided in two parts, 98 and 8551, that added together give a square (8649 = 93²).

The spelling of 988551 in words is "nine hundred eighty-eight thousand, five hundred fifty-one".