163234021 has 4 divisors (see below), whose sum is σ = 163493344. Its totient is φ = 162974700.

The previous prime is 163234009. The next prime is 163234033. The reversal of 163234021 is 120432361.

163234021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 an interprime number because it is at equal distance from previous prime (163234009) and next prime (163234033).

It is a cyclic number.

It is not a de Polignac number, because 163234021 - 2²¹ = 161136869 is a prime.

It is a super-2 number, since 2×163234021² = 53290691223656882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 163233983 and 163234001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163234081) 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, 128715 + ... + 129976.

It is an arithmetic number, because the mean of its divisors is an integer number (40873336).

Almost surely, 2^163234021 is an apocalyptic number.

It is an amenable number.

163234021 is a deficient number, since it is larger than the sum of its proper divisors (259323).

163234021 is an equidigital number, since it uses as much as digits as its factorization.

163234021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259322.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 163234021 is about 12776.3070172879. The cubic root of 163234021 is about 546.5168539426.

Adding to 163234021 its reverse (120432361), we get a palindrome (283666382).

It can be divided in two parts, 1632340 and 21, that added together give a palindrome (1632361).

The spelling of 163234021 in words is "one hundred sixty-three million, two hundred thirty-four thousand, twenty-one".