331999998 has 16 divisors (see below), whose sum is σ = 724363776. Its totient is φ = 100606040.

The previous prime is 331999991. The next prime is 332000017. The reversal of 331999998 is 899999133.

It is a super-2 number, since 2×331999998² = 220447997344000008, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331999991) 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, 2515086 + ... + 2515217.

It is an arithmetic number, because the mean of its divisors is an integer number (45272736).

Almost surely, 2^331999998 is an apocalyptic number.

331999998 is an abundant number, since it is smaller than the sum of its proper divisors (392363778).

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

331999998 is a wasteful number, since it uses less digits than its factorization.

331999998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5030319.

The product of its digits is 4251528, while the sum is 60.

The square root of 331999998 is about 18220.8671034065. The cubic root of 331999998 is about 692.4355558723.

The spelling of 331999998 in words is "three hundred thirty-one million, nine hundred ninety-nine thousand, nine hundred ninety-eight".