145512220 has 48 divisors (see below), whose sum is σ = 352654848. Its totient is φ = 49400640.

The previous prime is 145512209. The next prime is 145512223. The reversal of 145512220 is 22215541.

It is a junction number, because it is equal to n+sod(n) for n = 145512191 and 145512200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145512223) by changing a digit.

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, 9375 + ... + 19465.

It is an arithmetic number, because the mean of its divisors is an integer number (7346976).

Almost surely, 2^145512220 is an apocalyptic number.

145512220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 145512220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (176327424).

145512220 is an abundant number, since it is smaller than the sum of its proper divisors (207142628).

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

145512220 is a wasteful number, since it uses less digits than its factorization.

145512220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10210 (or 10208 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 145512220 is about 12062.8446064765. The cubic root of 145512220 is about 525.9766792708.

Adding to 145512220 its reverse (22215541), we get a palindrome (167727761).

The spelling of 145512220 in words is "one hundred forty-five million, five hundred twelve thousand, two hundred twenty".