145309224 has 16 divisors (see below), whose sum is σ = 363273120. Its totient is φ = 48436400.

The previous prime is 145309223. The next prime is 145309243. The reversal of 145309224 is 422903541.

It is a super-2 number, since 2×145309224² = 42229541158964352, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 145309191 and 145309200.

It is not an unprimeable number, because it can be changed into a prime (145309223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3027252 + ... + 3027299.

It is an arithmetic number, because the mean of its divisors is an integer number (22704570).

Almost surely, 2^145309224 is an apocalyptic number.

It is an amenable number.

145309224 is an abundant number, since it is smaller than the sum of its proper divisors (217963896).

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

145309224 is a wasteful number, since it uses less digits than its factorization.

145309224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6054560 (or 6054556 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 145309224 is about 12054.4275683253. The cubic root of 145309224 is about 525.7319785150.

The spelling of 145309224 in words is "one hundred forty-five million, three hundred nine thousand, two hundred twenty-four".