162003220 has 24 divisors (see below), whose sum is σ = 340465608. Its totient is φ = 64752000.

The previous prime is 162003211. The next prime is 162003227. The reversal of 162003220 is 22300261.

It can be written as a sum of positive squares in 4 ways, for example, as 21864976 + 140138244 = 4676^2 + 11838^2 .

It is a junction number, because it is equal to n+sod(n) for n = 162003194 and 162003203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (162003227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35890 + ... + 40150.

It is an arithmetic number, because the mean of its divisors is an integer number (14186067).

Almost surely, 2^162003220 is an apocalyptic number.

162003220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

162003220 is an abundant number, since it is smaller than the sum of its proper divisors (178462388).

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

162003220 is a wasteful number, since it uses less digits than its factorization.

162003220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6171 (or 6169 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 162003220 is about 12728.0485542757. The cubic root of 162003220 is about 545.1397896333.

Adding to 162003220 its reverse (22300261), we get a palindrome (184303481).

The spelling of 162003220 in words is "one hundred sixty-two million, three thousand, two hundred twenty".