163211240 has 16 divisors (see below), whose sum is σ = 367225380. Its totient is φ = 65284480.

The previous prime is 163211239. The next prime is 163211261. The reversal of 163211240 is 42112361.

It can be written as a sum of positive squares in 2 ways, for example, as 153313924 + 9897316 = 12382^2 + 3146^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2040101 + ... + 2040180.

Almost surely, 2^163211240 is an apocalyptic number.

163211240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

163211240 is an abundant number, since it is smaller than the sum of its proper divisors (204014140).

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

163211240 is a wasteful number, since it uses less digits than its factorization.

163211240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4080292 (or 4080288 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 163211240 is about 12775.4154531272. The cubic root of 163211240 is about 546.4914287288.

The spelling of 163211240 in words is "one hundred sixty-three million, two hundred eleven thousand, two hundred forty".