998505231 has 8 divisors (see below), whose sum is σ = 1331493504. Its totient is φ = 665593560.

The previous prime is 998505229. The next prime is 998505239. The reversal of 998505231 is 132505899.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 998505231 - 2¹ = 998505229 is a prime.

It is a super-2 number, since 2×998505231² = 1994025392668726722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998505239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27510 + ... + 52476.

It is an arithmetic number, because the mean of its divisors is an integer number (166436688).

Almost surely, 2^998505231 is an apocalyptic number.

998505231 is a deficient number, since it is larger than the sum of its proper divisors (332988273).

998505231 is a wasteful number, since it uses less digits than its factorization.

998505231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38301.

The product of its (nonzero) digits is 97200, while the sum is 42.

The square root of 998505231 is about 31599.1333900156. The cubic root of 998505231 is about 999.5014952009.

The spelling of 998505231 in words is "nine hundred ninety-eight million, five hundred five thousand, two hundred thirty-one".