145165220 has 12 divisors (see below), whose sum is σ = 304847004. Its totient is φ = 58066080.

The previous prime is 145165201. The next prime is 145165231. The reversal of 145165220 is 22561541.

It can be written as a sum of positive squares in 2 ways, for example, as 115047076 + 30118144 = 10726^2 + 5488^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 145165220.

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, 3629111 + ... + 3629150.

It is an arithmetic number, because the mean of its divisors is an integer number (25403917).

Almost surely, 2^145165220 is an apocalyptic number.

145165220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145165220 is an abundant number, since it is smaller than the sum of its proper divisors (159681784).

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

145165220 is a wasteful number, since it uses less digits than its factorization.

145165220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7258270 (or 7258268 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 145165220 is about 12048.4530127316. The cubic root of 145165220 is about 525.5582512303.

The spelling of 145165220 in words is "one hundred forty-five million, one hundred sixty-five thousand, two hundred twenty".