163121360 has 40 divisors (see below), whose sum is σ = 388085280. Its totient is φ = 63729792.

The previous prime is 163121351. The next prime is 163121369. The reversal of 163121360 is 63121361.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (163121351) and next prime (163121369).

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163121369) 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 7 ways as a sum of consecutive naturals, for example, 20270 + ... + 27149.

It is an arithmetic number, because the mean of its divisors is an integer number (9702132).

Almost surely, 2^163121360 is an apocalyptic number.

163121360 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

163121360 is an abundant number, since it is smaller than the sum of its proper divisors (224963920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

163121360 is a wasteful number, since it uses less digits than its factorization.

163121360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47475 (or 47469 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 163121360 is about 12771.8972748766. The cubic root of 163121360 is about 546.3910931782.

Subtracting from 163121360 its reverse (63121361), we obtain a palindrome (99999999).

The spelling of 163121360 in words is "one hundred sixty-three million, one hundred twenty-one thousand, three hundred sixty".