163400220 has 48 divisors (see below), whose sum is σ = 508357920. Its totient is φ = 43573248.

The previous prime is 163400213. The next prime is 163400227. The reversal of 163400220 is 22004361.

It is a happy number.

163400220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (163400213) and next prime (163400227).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 163400193 and 163400202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163400227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 150757 + ... + 151836.

It is an arithmetic number, because the mean of its divisors is an integer number (10590790).

Almost surely, 2^163400220 is an apocalyptic number.

163400220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

163400220 is an abundant number, since it is smaller than the sum of its proper divisors (344957700).

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

163400220 is a wasteful number, since it uses less digits than its factorization.

163400220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302611 (or 302603 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 163400220 is about 12782.8095503297. The cubic root of 163400220 is about 546.7022722859.

Adding to 163400220 its reverse (22004361), we get a palindrome (185404581).

The spelling of 163400220 in words is "one hundred sixty-three million, four hundred thousand, two hundred twenty".