31098 has 16 divisors (see below), whose sum is σ = 63936. Its totient is φ = 10080.

The previous prime is 31091. The next prime is 31121. The reversal of 31098 is 89013.

It is a nialpdrome in base 15.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 31098.

It is not an unprimeable number, because it can be changed into a prime (31091) 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, 390 + ... + 462.

It is an arithmetic number, because the mean of its divisors is an integer number (3996).

2³¹⁰⁹⁸ is an apocalyptic number.

31098 is an abundant number, since it is smaller than the sum of its proper divisors (32838).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31968).

31098 is a wasteful number, since it uses less digits than its factorization.

31098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 31098 is about 176.3462503145. The cubic root of 31098 is about 31.4468744235.

The spelling of 31098 in words is "thirty-one thousand, ninety-eight".