198531423 has 24 divisors (see below), whose sum is σ = 316843488. Its totient is φ = 119150592.

The previous prime is 198531371. The next prime is 198531433. The reversal of 198531423 is 324135891.

It is a de Polignac number, because none of the positive numbers 2^k-198531423 is a prime.

It is a super-3 number, since 3×198531423³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198531433) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24690 + ... + 31727.

It is an arithmetic number, because the mean of its divisors is an integer number (13201812).

Almost surely, 2^198531423 is an apocalyptic number.

198531423 is a deficient number, since it is larger than the sum of its proper divisors (118312065).

198531423 is a wasteful number, since it uses less digits than its factorization.

198531423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56463 (or 56460 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 198531423 is about 14090.1179200176. The cubic root of 198531423 is about 583.3686480570.

The spelling of 198531423 in words is "one hundred ninety-eight million, five hundred thirty-one thousand, four hundred twenty-three".