163213501 has 4 divisors (see below), whose sum is σ = 178051104. Its totient is φ = 148375900.

The previous prime is 163213499. The next prime is 163213517. The reversal of 163213501 is 105312361.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 163213501 - 2¹ = 163213499 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163213301) 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, 7418785 + ... + 7418806.

It is an arithmetic number, because the mean of its divisors is an integer number (44512776).

Almost surely, 2^163213501 is an apocalyptic number.

163213501 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

163213501 is a deficient number, since it is larger than the sum of its proper divisors (14837603).

163213501 is a wasteful number, since it uses less digits than its factorization.

163213501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14837602.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 163213501 is about 12775.5039430936. The cubic root of 163213501 is about 546.4939522711.

Adding to 163213501 its reverse (105312361), we get a palindrome (268525862).

The spelling of 163213501 in words is "one hundred sixty-three million, two hundred thirteen thousand, five hundred one".