163540141 has 4 divisors (see below), whose sum is σ = 164370492. Its totient is φ = 162709792.

The previous prime is 163540133. The next prime is 163540147. The reversal of 163540141 is 141045361.

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

It can be written as a sum of positive squares in 2 ways, for example, as 141015625 + 22524516 = 11875^2 + 4746^2 .

It is a cyclic number.

It is not a de Polignac number, because 163540141 - 2³ = 163540133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163540147) 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, 414880 + ... + 415273.

It is an arithmetic number, because the mean of its divisors is an integer number (41092623).

Almost surely, 2^163540141 is an apocalyptic number.

It is an amenable number.

163540141 is a deficient number, since it is larger than the sum of its proper divisors (830351).

163540141 is an equidigital number, since it uses as much as digits as its factorization.

163540141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 830350.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 163540141 is about 12788.2813935259. The cubic root of 163540141 is about 546.8582763691.

The spelling of 163540141 in words is "one hundred sixty-three million, five hundred forty thousand, one hundred forty-one".