225621195552 has 48 divisors (see below), whose sum is σ = 658061822880. Its totient is φ = 75207064896.

The previous prime is 225621195551. The next prime is 225621195559. The reversal of 225621195552 is 255591126522.

225621195552 is a `hidden beast` number, since 2 + 2 + 5 + 6 + 2 + 1 + 1 + 95 + 552 = 666.

It is a tau number, because it is divible by the number of its divisors (48).

It is a junction number, because it is equal to n+sod(n) for n = 225621195498 and 225621195507.

It is not an unprimeable number, because it can be changed into a prime (225621195551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130566958 + ... + 130568685.

It is an arithmetic number, because the mean of its divisors is an integer number (13709621310).

Almost surely, 2^225621195552 is an apocalyptic number.

It is an amenable number.

225621195552 is an abundant number, since it is smaller than the sum of its proper divisors (432440627328).

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

225621195552 is a wasteful number, since it uses less digits than its factorization.

225621195552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261135662 (or 261135648 counting only the distinct ones).

The product of its digits is 540000, while the sum is 45.

The spelling of 225621195552 in words is "two hundred twenty-five billion, six hundred twenty-one million, one hundred ninety-five thousand, five hundred fifty-two".