198316631 has 16 divisors (see below), whose sum is σ = 207996768. Its totient is φ = 188928000.

The previous prime is 198316621. The next prime is 198316639. The reversal of 198316631 is 136613891.

198316631 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 198316631 - 2⁶ = 198316567 is a prime.

It is a super-2 number, since 2×198316631² = 78658972262380322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198316639) 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, 343415 + ... + 343991.

It is an arithmetic number, because the mean of its divisors is an integer number (12999798).

Almost surely, 2^198316631 is an apocalyptic number.

198316631 is a deficient number, since it is larger than the sum of its proper divisors (9680137).

198316631 is a wasteful number, since it uses less digits than its factorization.

198316631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 802.

The product of its digits is 23328, while the sum is 38.

The square root of 198316631 is about 14082.4937777370. The cubic root of 198316631 is about 583.1581891239.

It can be divided in two parts, 19831 and 6631, that added together give a palindrome (26462).

The spelling of 198316631 in words is "one hundred ninety-eight million, three hundred sixteen thousand, six hundred thirty-one".