145233225 has 18 divisors (see below), whose sum is σ = 260129246. Its totient is φ = 77457600.

The previous prime is 145233211. The next prime is 145233239. The reversal of 145233225 is 522332541.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (145233211) and next prime (145233239).

It can be written as a sum of positive squares in 3 ways, for example, as 33212169 + 112021056 = 5763^2 + 10584^2 .

It is not a de Polignac number, because 145233225 - 2⁷ = 145233097 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 322516 + ... + 322965.

Almost surely, 2^145233225 is an apocalyptic number.

145233225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

145233225 is a deficient number, since it is larger than the sum of its proper divisors (114896021).

145233225 is a wasteful number, since it uses less digits than its factorization.

145233225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645497 (or 645489 counting only the distinct ones).

The product of its digits is 7200, while the sum is 27.

The square root of 145233225 is about 12051.2748288304. The cubic root of 145233225 is about 525.6403071783.

Adding to 145233225 its reverse (522332541), we get a palindrome (667565766).

The spelling of 145233225 in words is "one hundred forty-five million, two hundred thirty-three thousand, two hundred twenty-five".