16151998 has 4 divisors (see below), whose sum is σ = 24228000. Its totient is φ = 8075998.

The previous prime is 16151981. The next prime is 16151999. The reversal of 16151998 is 89915161.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 16151998.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16151999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4037998 + ... + 4038001.

It is an arithmetic number, because the mean of its divisors is an integer number (6057000).

Almost surely, 2^16151998 is an apocalyptic number.

16151998 is a deficient number, since it is larger than the sum of its proper divisors (8076002).

16151998 is an equidigital number, since it uses as much as digits as its factorization.

16151998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8076001.

The product of its digits is 19440, while the sum is 40.

The square root of 16151998 is about 4018.9548392586. The cubic root of 16151998 is about 252.7796359544.

The spelling of 16151998 in words is "sixteen million, one hundred fifty-one thousand, nine hundred ninety-eight".