225155216601 has 48 divisors (see below), whose sum is σ = 375270987520. Its totient is φ = 127419868800.

The previous prime is 225155216597. The next prime is 225155216603. The reversal of 225155216601 is 106612551522.

225155216601 is a `hidden beast` number, since 2 + 25 + 1 + 5 + 5 + 21 + 6 + 601 = 666.

It is not a de Polignac number, because 225155216601 - 2² = 225155216597 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (225155216603) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 17511291 + ... + 17524143.

Almost surely, 2^225155216601 is an apocalyptic number.

225155216601 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

225155216601 is a deficient number, since it is larger than the sum of its proper divisors (150115770919).

225155216601 is a wasteful number, since it uses less digits than its factorization.

225155216601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15526 (or 15523 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

The spelling of 225155216601 in words is "two hundred twenty-five billion, one hundred fifty-five million, two hundred sixteen thousand, six hundred one".