145225444 has 96 divisors (see below), whose sum is σ = 330333696. Its totient is φ = 54328320.

The previous prime is 145225439. The next prime is 145225541. The reversal of 145225444 is 444522541.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 552057 + ... + 552319.

It is an arithmetic number, because the mean of its divisors is an integer number (3440976).

Almost surely, 2^145225444 is an apocalyptic number.

145225444 is a gapful number since it is divisible by the number (14) 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 145225444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (165166848).

145225444 is an abundant number, since it is smaller than the sum of its proper divisors (185108252).

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

145225444 is a wasteful number, since it uses less digits than its factorization.

145225444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365 (or 363 counting only the distinct ones).

The product of its digits is 25600, while the sum is 31.

The square root of 145225444 is about 12050.9519955894. The cubic root of 145225444 is about 525.6309197940.

Adding to 145225444 its reverse (444522541), we get a palindrome (589747985).

It can be divided in two parts, 1452 and 25444, that added together give a square (26896 = 164²).

The spelling of 145225444 in words is "one hundred forty-five million, two hundred twenty-five thousand, four hundred forty-four".