231020198 has 4 divisors (see below), whose sum is σ = 346530300. Its totient is φ = 115510098.

The previous prime is 231020197. The next prime is 231020233. The reversal of 231020198 is 891020132.

231020198 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231020197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57755048 + ... + 57755051.

It is an arithmetic number, because the mean of its divisors is an integer number (86632575).

Almost surely, 2^231020198 is an apocalyptic number.

231020198 is a deficient number, since it is larger than the sum of its proper divisors (115510102).

231020198 is a wasteful number, since it uses less digits than its factorization.

231020198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115510101.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 231020198 is about 15199.3486044633. The cubic root of 231020198 is about 613.5971266680.

The spelling of 231020198 in words is "two hundred thirty-one million, twenty thousand, one hundred ninety-eight".