145223020 has 24 divisors (see below), whose sum is σ = 305316144. Its totient is φ = 58022976.

The previous prime is 145223017. The next prime is 145223041. The reversal of 145223020 is 20322541.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16299 + ... + 23581.

It is an arithmetic number, because the mean of its divisors is an integer number (12721506).

Almost surely, 2^145223020 is an apocalyptic number.

145223020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145223020 is an abundant number, since it is smaller than the sum of its proper divisors (160093124).

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

145223020 is a wasteful number, since it uses less digits than its factorization.

145223020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8289 (or 8287 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 145223020 is about 12050.8514222025. The cubic root of 145223020 is about 525.6279952917.

Adding to 145223020 its reverse (20322541), we get a palindrome (165545561).

The spelling of 145223020 in words is "one hundred forty-five million, two hundred twenty-three thousand, twenty".