225540245 has 16 divisors (see below), whose sum is σ = 309657600. Its totient is φ = 154483584.

The previous prime is 225540239. The next prime is 225540251. The reversal of 225540245 is 542045522.

It is an interprime number because it is at equal distance from previous prime (225540239) and next prime (225540251).

It is a cyclic number.

It is not a de Polignac number, because 225540245 - 2¹⁶ = 225474709 is a prime.

It is a super-2 number, since 2×225540245² = 101736804229320050, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

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, 33644 + ... + 39786.

It is an arithmetic number, because the mean of its divisors is an integer number (19353600).

Almost surely, 2^225540245 is an apocalyptic number.

It is an amenable number.

225540245 is a deficient number, since it is larger than the sum of its proper divisors (84117355).

225540245 is a wasteful number, since it uses less digits than its factorization.

225540245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7204.

The product of its (nonzero) digits is 16000, while the sum is 29.

The square root of 225540245 is about 15017.9973698226. The cubic root of 225540245 is about 608.7066073831.

Adding to 225540245 its reverse (542045522), we get a palindrome (767585767).

The spelling of 225540245 in words is "two hundred twenty-five million, five hundred forty thousand, two hundred forty-five".