145206225 has 36 divisors (see below), whose sum is σ = 261318096. Its totient is φ = 77075040.

The previous prime is 145206221. The next prime is 145206233. The reversal of 145206225 is 522602541.

145206225 is a `hidden beast` number, since 14 + 5 + 20 + 622 + 5 = 666.

It is not a de Polignac number, because 145206225 - 2² = 145206221 is a prime.

It is not an unprimeable number, because it can be changed into a prime (145206221) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 49654 + ... + 52496.

It is an arithmetic number, because the mean of its divisors is an integer number (7258836).

Almost surely, 2^145206225 is an apocalyptic number.

145206225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

145206225 is a deficient number, since it is larger than the sum of its proper divisors (116111871).

145206225 is a wasteful number, since it uses less digits than its factorization.

145206225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3086 (or 3078 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 145206225 is about 12050.1545633241. The cubic root of 145206225 is about 525.6077316023.

Adding to 145206225 its reverse (522602541), we get a palindrome (667808766).

The spelling of 145206225 in words is "one hundred forty-five million, two hundred six thousand, two hundred twenty-five".