231513198 has 32 divisors (see below), whose sum is σ = 534637824. Its totient is φ = 65463552.

The previous prime is 231513197. The next prime is 231513199. The reversal of 231513198 is 891315132.

231513198 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (231513197) and next prime (231513199).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231513197) 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, 24340 + ... + 32487.

It is an arithmetic number, because the mean of its divisors is an integer number (16707432).

Almost surely, 2^231513198 is an apocalyptic number.

231513198 is an abundant number, since it is smaller than the sum of its proper divisors (303124626).

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

231513198 is a wasteful number, since it uses less digits than its factorization.

231513198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56936.

The product of its digits is 6480, while the sum is 33.

The square root of 231513198 is about 15215.5577617122. The cubic root of 231513198 is about 614.0332912095.

The spelling of 231513198 in words is "two hundred thirty-one million, five hundred thirteen thousand, one hundred ninety-eight".