16131998 has 8 divisors (see below), whose sum is σ = 24712992. Its totient is φ = 7894336.

The previous prime is 16131989. The next prime is 16132019. The reversal of 16131998 is 89913161.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85715 + ... + 85902.

It is an arithmetic number, because the mean of its divisors is an integer number (3089124).

Almost surely, 2^16131998 is an apocalyptic number.

16131998 is a deficient number, since it is larger than the sum of its proper divisors (8580994).

16131998 is a wasteful number, since it uses less digits than its factorization.

16131998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171666.

The product of its digits is 11664, while the sum is 38.

The square root of 16131998 is about 4016.4658594341. The cubic root of 16131998 is about 252.6752591702.

The spelling of 16131998 in words is "sixteen million, one hundred thirty-one thousand, nine hundred ninety-eight".