159218421 has 8 divisors (see below), whose sum is σ = 212543520. Its totient is φ = 106019472.

The previous prime is 159218401. The next prime is 159218429. The reversal of 159218421 is 124812951.

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

It is not a de Polignac number, because 159218421 - 2¹⁴ = 159202037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159218429) 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, 28551 + ... + 33668.

It is an arithmetic number, because the mean of its divisors is an integer number (26567940).

Almost surely, 2^159218421 is an apocalyptic number.

It is an amenable number.

159218421 is a deficient number, since it is larger than the sum of its proper divisors (53325099).

159218421 is an equidigital number, since it uses as much as digits as its factorization.

159218421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63075.

The product of its digits is 5760, while the sum is 33.

The square root of 159218421 is about 12618.1781965544. The cubic root of 159218421 is about 541.9981084523.

It can be divided in two parts, 15921 and 8421, that added together give a palindrome (24342).

The spelling of 159218421 in words is "one hundred fifty-nine million, two hundred eighteen thousand, four hundred twenty-one".