225661520554 has 8 divisors (see below), whose sum is σ = 338598701028. Its totient is φ = 112795286880.

The previous prime is 225661520549. The next prime is 225661520587. The reversal of 225661520554 is 455025166522.

It can be written as a sum of positive squares in 2 ways, for example, as 225515763225 + 145757329 = 474885^2 + 12073^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 225661520554.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17728747 + ... + 17741470.

Almost surely, 2^225661520554 is an apocalyptic number.

225661520554 is a deficient number, since it is larger than the sum of its proper divisors (112937180474).

225661520554 is a wasteful number, since it uses less digits than its factorization.

225661520554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35473400.

The product of its (nonzero) digits is 720000, while the sum is 43.

The spelling of 225661520554 in words is "two hundred twenty-five billion, six hundred sixty-one million, five hundred twenty thousand, five hundred fifty-four".