163145820 has 48 divisors (see below), whose sum is σ = 461260800. Its totient is φ = 43081536.

The previous prime is 163145809. The next prime is 163145849. The reversal of 163145820 is 28541361.

163145820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7020 + ... + 19379.

It is an arithmetic number, because the mean of its divisors is an integer number (9609600).

Almost surely, 2^163145820 is an apocalyptic number.

163145820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

163145820 is an abundant number, since it is smaller than the sum of its proper divisors (298114980).

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

163145820 is a wasteful number, since it uses less digits than its factorization.

163145820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26514 (or 26512 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 163145820 is about 12772.8548101041. The cubic root of 163145820 is about 546.4184022079.

The spelling of 163145820 in words is "one hundred sixty-three million, one hundred forty-five thousand, eight hundred twenty".