225515566 has 4 divisors (see below), whose sum is σ = 338273352. Its totient is φ = 112757782.

The previous prime is 225515531. The next prime is 225515603. The reversal of 225515566 is 665515522.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 56378890 + ... + 56378893.

It is an arithmetic number, because the mean of its divisors is an integer number (84568338).

Almost surely, 2^225515566 is an apocalyptic number.

225515566 is a deficient number, since it is larger than the sum of its proper divisors (112757786).

225515566 is a wasteful number, since it uses less digits than its factorization.

225515566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112757785.

The product of its digits is 90000, while the sum is 37.

The square root of 225515566 is about 15017.1756998445. The cubic root of 225515566 is about 608.6844046666.

The spelling of 225515566 in words is "two hundred twenty-five million, five hundred fifteen thousand, five hundred sixty-six".