153445220 has 12 divisors (see below), whose sum is σ = 322235004. Its totient is φ = 61378080.

The previous prime is 153445207. The next prime is 153445249. The reversal of 153445220 is 22544351.

It is a happy number.

153445220 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 119596096 + 33849124 = 10936^2 + 5818^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 153445220.

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, 3836111 + ... + 3836150.

It is an arithmetic number, because the mean of its divisors is an integer number (26852917).

Almost surely, 2^153445220 is an apocalyptic number.

153445220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

153445220 is an abundant number, since it is smaller than the sum of its proper divisors (168789784).

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

153445220 is a wasteful number, since it uses less digits than its factorization.

153445220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7672270 (or 7672268 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 153445220 is about 12387.3007552089. The cubic root of 153445220 is about 535.3664127478.

Adding to 153445220 its reverse (22544351), we get a palindrome (175989571).

The spelling of 153445220 in words is "one hundred fifty-three million, four hundred forty-five thousand, two hundred twenty".