145545220 has 24 divisors (see below), whose sum is σ = 306319104. Its totient is φ = 58089696.

The previous prime is 145545209. The next prime is 145545233. The reversal of 145545220 is 22545541.

It is a super-2 number, since 2×145545220² = 42366822129696800, which contains 22 as substring.

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, 1549 + ... + 17131.

It is an arithmetic number, because the mean of its divisors is an integer number (12763296).

Almost surely, 2^145545220 is an apocalyptic number.

145545220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145545220 is an abundant number, since it is smaller than the sum of its proper divisors (160773884).

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

145545220 is a wasteful number, since it uses less digits than its factorization.

145545220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16059 (or 16057 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 28.

The square root of 145545220 is about 12064.2123655048. The cubic root of 145545220 is about 526.0164374860.

The spelling of 145545220 in words is "one hundred forty-five million, five hundred forty-five thousand, two hundred twenty".