145224552 has 64 divisors (see below), whose sum is σ = 398799360. Its totient is φ = 43704000.

The previous prime is 145224533. The next prime is 145224589. The reversal of 145224552 is 255422541.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38043 + ... + 41685.

It is an arithmetic number, because the mean of its divisors is an integer number (6231240).

Almost surely, 2^145224552 is an apocalyptic number.

145224552 is a gapful number since it is divisible by the number (12) 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 145224552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (199399680).

145224552 is an abundant number, since it is smaller than the sum of its proper divisors (253574808).

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

145224552 is a wasteful number, since it uses less digits than its factorization.

145224552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3814 (or 3810 counting only the distinct ones).

The product of its digits is 16000, while the sum is 30.

The square root of 145224552 is about 12050.9149860083. The cubic root of 145224552 is about 525.6298436196.

The spelling of 145224552 in words is "one hundred forty-five million, two hundred twenty-four thousand, five hundred fifty-two".