145250220 has 48 divisors (see below), whose sum is σ = 407782368. Its totient is φ = 38630400.

The previous prime is 145250201. The next prime is 145250233. The reversal of 145250220 is 22052541.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21042 + ... + 27078.

It is an arithmetic number, because the mean of its divisors is an integer number (8495466).

Almost surely, 2^145250220 is an apocalyptic number.

145250220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145250220 is an abundant number, since it is smaller than the sum of its proper divisors (262532148).

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

145250220 is a wasteful number, since it uses less digits than its factorization.

145250220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6450 (or 6448 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 145250220 is about 12051.9799203284. The cubic root of 145250220 is about 525.6608096232.

The spelling of 145250220 in words is "one hundred forty-five million, two hundred fifty thousand, two hundred twenty".