225172685506 has 32 divisors (see below), whose sum is σ = 356750222400. Its totient is φ = 106296857280.

The previous prime is 225172685497. The next prime is 225172685557. The reversal of 225172685506 is 605586271522.

It is a self number, because there is not a number n which added to its sum of digits gives 225172685506.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22375716 + ... + 22385776.

It is an arithmetic number, because the mean of its divisors is an integer number (11148444450).

Almost surely, 2^225172685506 is an apocalyptic number.

225172685506 is a deficient number, since it is larger than the sum of its proper divisors (131577536894).

225172685506 is a wasteful number, since it uses less digits than its factorization.

225172685506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12034.

The product of its (nonzero) digits is 2016000, while the sum is 49.

The spelling of 225172685506 in words is "two hundred twenty-five billion, one hundred seventy-two million, six hundred eighty-five thousand, five hundred six".