163142501 has 4 divisors (see below), whose sum is σ = 163277772. Its totient is φ = 163007232.

The previous prime is 163142471. The next prime is 163142513. The reversal of 163142501 is 105241361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 105241361 = 19 ⋅5539019.

It can be written as a sum of positive squares in 2 ways, for example, as 36602500 + 126540001 = 6050^2 + 11249^2 .

It is a cyclic number.

It is not a de Polignac number, because 163142501 - 2⁶ = 163142437 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 (163142401) 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, 65810 + ... + 68243.

It is an arithmetic number, because the mean of its divisors is an integer number (40819443).

Almost surely, 2^163142501 is an apocalyptic number.

It is an amenable number.

163142501 is a deficient number, since it is larger than the sum of its proper divisors (135271).

163142501 is a wasteful number, since it uses less digits than its factorization.

163142501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135270.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 163142501 is about 12772.7248854737. The cubic root of 163142501 is about 546.4146967805.

Adding to 163142501 its reverse (105241361), we get a palindrome (268383862).

The spelling of 163142501 in words is "one hundred sixty-three million, one hundred forty-two thousand, five hundred one".