225164661 has 16 divisors (see below), whose sum is σ = 308958720. Its totient is φ = 145774080.

The previous prime is 225164659. The next prime is 225164663. The reversal of 225164661 is 166461522.

It is an interprime number because it is at equal distance from previous prime (225164659) and next prime (225164663).

It is not a de Polignac number, because 225164661 - 2¹ = 225164659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225164663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23325 + ... + 31533.

It is an arithmetic number, because the mean of its divisors is an integer number (19309920).

Almost surely, 2^225164661 is an apocalyptic number.

It is an amenable number.

225164661 is a deficient number, since it is larger than the sum of its proper divisors (83794059).

225164661 is a wasteful number, since it uses less digits than its factorization.

225164661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8476.

The product of its digits is 17280, while the sum is 33.

The square root of 225164661 is about 15005.4876961730. The cubic root of 225164661 is about 608.3685339653.

The spelling of 225164661 in words is "two hundred twenty-five million, one hundred sixty-four thousand, six hundred sixty-one".