145506224 has 40 divisors (see below), whose sum is σ = 292682160. Its totient is φ = 69993728.

The previous prime is 145506209. The next prime is 145506227. The reversal of 145506224 is 422605541.

145506224 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×145506224² = 42344122445476352, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145506227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 258167 + ... + 258729.

It is an arithmetic number, because the mean of its divisors is an integer number (7317054).

Almost surely, 2^145506224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 145506224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146341080).

145506224 is an abundant number, since it is smaller than the sum of its proper divisors (147175936).

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

145506224 is a wasteful number, since it uses less digits than its factorization.

145506224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1157 (or 1151 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 145506224 is about 12062.5960721563. The cubic root of 145506224 is about 525.9694546783.

The spelling of 145506224 in words is "one hundred forty-five million, five hundred six thousand, two hundred twenty-four".