981840231 has 16 divisors (see below), whose sum is σ = 1455948000. Its totient is φ = 653943744.

The previous prime is 981840227. The next prime is 981840241. The reversal of 981840231 is 132048189.

It is not a de Polignac number, because 981840231 - 2² = 981840227 is a prime.

It is a super-2 number, since 2×981840231² = 1928020478420266722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981840241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13045 + ... + 46193.

It is an arithmetic number, because the mean of its divisors is an integer number (90996750).

Almost surely, 2^981840231 is an apocalyptic number.

981840231 is a deficient number, since it is larger than the sum of its proper divisors (474107769).

981840231 is a wasteful number, since it uses less digits than its factorization.

981840231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34255 (or 34249 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 981840231 is about 31334.3299114565. The cubic root of 981840231 is about 993.9097275471.

The spelling of 981840231 in words is "nine hundred eighty-one million, eight hundred forty thousand, two hundred thirty-one".