145500220 has 12 divisors (see below), whose sum is σ = 305550504. Its totient is φ = 58200080.

The previous prime is 145500193. The next prime is 145500227. The reversal of 145500220 is 22005541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145500227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3637486 + ... + 3637525.

It is an arithmetic number, because the mean of its divisors is an integer number (25462542).

Almost surely, 2^145500220 is an apocalyptic number.

145500220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145500220 is an abundant number, since it is smaller than the sum of its proper divisors (160050284).

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

145500220 is a wasteful number, since it uses less digits than its factorization.

145500220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7275020 (or 7275018 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 145500220 is about 12062.3472011048. The cubic root of 145500220 is about 525.9622202477.

Adding to 145500220 its reverse (22005541), we get a palindrome (167505761).

The spelling of 145500220 in words is "one hundred forty-five million, five hundred thousand, two hundred twenty".