225551061 has 10 divisors (see below), whose sum is σ = 336934422. Its totient is φ = 150367320.

The previous prime is 225551021. The next prime is 225551063. The reversal of 225551061 is 160155522.

225551061 is a `hidden beast` number, since 2 + 2 + 555 + 106 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 224820036 + 731025 = 14994^2 + 855^2 .

It is not a de Polignac number, because 225551061 - 2⁷ = 225550933 is a prime.

It is a super-2 number, since 2×225551061² = 101746562236451442, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225551063) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1392210 + ... + 1392371.

Almost surely, 2^225551061 is an apocalyptic number.

It is an amenable number.

225551061 is a deficient number, since it is larger than the sum of its proper divisors (111383361).

225551061 is an equidigital number, since it uses as much as digits as its factorization.

225551061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2784593 (or 2784584 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 225551061 is about 15018.3574667804. The cubic root of 225551061 is about 608.7163375984.

The spelling of 225551061 in words is "two hundred twenty-five million, five hundred fifty-one thousand, sixty-one".