998181151 has 6 divisors (see below), whose sum is σ = 1097174456. Its totient is φ = 907437300.

The previous prime is 998181133. The next prime is 998181161. The reversal of 998181151 is 151181899.

It is a happy number.

It is not a de Polignac number, because 998181151 - 2⁹ = 998180639 is a prime.

It is a super-2 number, since 2×998181151² = 1992731220423369602, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 998181098 and 998181107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998181161) 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 5 ways as a sum of consecutive naturals, for example, 4124595 + ... + 4124836.

Almost surely, 2^998181151 is an apocalyptic number.

998181151 is a deficient number, since it is larger than the sum of its proper divisors (98993305).

998181151 is a wasteful number, since it uses less digits than its factorization.

998181151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8249453 (or 8249442 counting only the distinct ones).

The product of its digits is 25920, while the sum is 43.

The square root of 998181151 is about 31594.0049851234. The cubic root of 998181151 is about 999.3933490490.

The spelling of 998181151 in words is "nine hundred ninety-eight million, one hundred eighty-one thousand, one hundred fifty-one".