159224981 has 4 divisors (see below), whose sum is σ = 160178592. Its totient is φ = 158271372.

The previous prime is 159224971. The next prime is 159224983. The reversal of 159224981 is 189422951.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 189422951 = 19 ⋅9969629.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-159224981 is a prime.

It is a super-2 number, since 2×159224981² = 50705189148900722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159224983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 476555 + ... + 476888.

It is an arithmetic number, because the mean of its divisors is an integer number (40044648).

Almost surely, 2^159224981 is an apocalyptic number.

It is an amenable number.

159224981 is a deficient number, since it is larger than the sum of its proper divisors (953611).

159224981 is an equidigital number, since it uses as much as digits as its factorization.

159224981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 953610.

The product of its digits is 51840, while the sum is 41.

The square root of 159224981 is about 12618.4381363147. The cubic root of 159224981 is about 542.0055520189.

The spelling of 159224981 in words is "one hundred fifty-nine million, two hundred twenty-four thousand, nine hundred eighty-one".