163138401 has 8 divisors (see below), whose sum is σ = 241686560. Its totient is φ = 108758916.

The previous prime is 163138373. The next prime is 163138403. The reversal of 163138401 is 104831361.

163138401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 163138401 - 2²⁵ = 129583969 is a prime.

It is a super-2 number, since 2×163138401² = 53228275761673602, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 6042163 = 163138401 / (1 + 6 + 3 + 1 + 3 + 8 + 4 + 0 + 1).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (163138403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3021055 + ... + 3021108.

It is an arithmetic number, because the mean of its divisors is an integer number (30210820).

Almost surely, 2^163138401 is an apocalyptic number.

It is an amenable number.

163138401 is a deficient number, since it is larger than the sum of its proper divisors (78548159).

163138401 is an equidigital number, since it uses as much as digits as its factorization.

163138401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6042172 (or 6042166 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 163138401 is about 12772.5643862147. The cubic root of 163138401 is about 546.4101193527.

Adding to 163138401 its reverse (104831361), we get a palindrome (267969762).

The spelling of 163138401 in words is "one hundred sixty-three million, one hundred thirty-eight thousand, four hundred one".