162107981 has 16 divisors (see below), whose sum is σ = 197775360. Its totient is φ = 129774960.

The previous prime is 162107947. The next prime is 162107993. The reversal of 162107981 is 189701261.

It is not a de Polignac number, because 162107981 - 2⁶ = 162107917 is a prime.

It is a super-2 number, since 2×162107981² = 52557995007792722, 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 (162007981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 860 + ... + 18026.

It is an arithmetic number, because the mean of its divisors is an integer number (12360960).

Almost surely, 2^162107981 is an apocalyptic number.

It is an amenable number.

162107981 is a deficient number, since it is larger than the sum of its proper divisors (35667379).

162107981 is a wasteful number, since it uses less digits than its factorization.

162107981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17264.

The product of its (nonzero) digits is 6048, while the sum is 35.

The square root of 162107981 is about 12732.1632490320. The cubic root of 162107981 is about 545.2572710097.

The spelling of 162107981 in words is "one hundred sixty-two million, one hundred seven thousand, nine hundred eighty-one".