163135523 has 4 divisors (see below), whose sum is σ = 163276008. Its totient is φ = 162995040.

The previous prime is 163135471. The next prime is 163135529. The reversal of 163135523 is 325531361.

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

It is a cyclic number.

It is not a de Polignac number, because 163135523 - 2⁶ = 163135459 is a prime.

It is a super-2 number, since 2×163135523² = 53226397728967058, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163135529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68486 + ... + 70827.

It is an arithmetic number, because the mean of its divisors is an integer number (40819002).

Almost surely, 2^163135523 is an apocalyptic number.

163135523 is a deficient number, since it is larger than the sum of its proper divisors (140485).

163135523 is a wasteful number, since it uses less digits than its factorization.

163135523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140484.

The product of its digits is 8100, while the sum is 29.

The square root of 163135523 is about 12772.4517223593. The cubic root of 163135523 is about 546.4069061760.

Adding to 163135523 its reverse (325531361), we get a palindrome (488666884).

The spelling of 163135523 in words is "one hundred sixty-three million, one hundred thirty-five thousand, five hundred twenty-three".