145224250 has 32 divisors (see below), whose sum is σ = 273731328. Its totient is φ = 57690000.

The previous prime is 145224179. The next prime is 145224253. The reversal of 145224250 is 52422541.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (145224253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35827 + ... + 39673.

It is an arithmetic number, because the mean of its divisors is an integer number (8554104).

Almost surely, 2^145224250 is an apocalyptic number.

145224250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

145224250 is a deficient number, since it is larger than the sum of its proper divisors (128507078).

145224250 is a wasteful number, since it uses less digits than its factorization.

145224250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4015 (or 4005 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 145224250 is about 12050.9024558329. The cubic root of 145224250 is about 525.6294792635.

Adding to 145224250 its reverse (52422541), we get a palindrome (197646791).

The spelling of 145224250 in words is "one hundred forty-five million, two hundred twenty-four thousand, two hundred fifty".