163554421 has 8 divisors (see below), whose sum is σ = 165784320. Its totient is φ = 161337072.

The previous prime is 163554401. The next prime is 163554427. The reversal of 163554421 is 124455361.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 163554421 - 2⁵ = 163554389 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 (163554427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24756 + ... + 30658.

It is an arithmetic number, because the mean of its divisors is an integer number (20723040).

Almost surely, 2^163554421 is an apocalyptic number.

It is an amenable number.

163554421 is a deficient number, since it is larger than the sum of its proper divisors (2229899).

163554421 is a wasteful number, since it uses less digits than its factorization.

163554421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6275.

The product of its digits is 14400, while the sum is 31.

The square root of 163554421 is about 12788.8397049928. The cubic root of 163554421 is about 546.8741927651.

The spelling of 163554421 in words is "one hundred sixty-three million, five hundred fifty-four thousand, four hundred twenty-one".