225661057 has 4 divisors (see below), whose sum is σ = 227308356. Its totient is φ = 224013760.

The previous prime is 225661019. The next prime is 225661061. The reversal of 225661057 is 750166522.

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

It can be written as a sum of positive squares in 2 ways, for example, as 151683856 + 73977201 = 12316^2 + 8601^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-225661057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225662057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 823444 + ... + 823717.

It is an arithmetic number, because the mean of its divisors is an integer number (56827089).

Almost surely, 2^225661057 is an apocalyptic number.

It is an amenable number.

225661057 is a deficient number, since it is larger than the sum of its proper divisors (1647299).

225661057 is a wasteful number, since it uses less digits than its factorization.

225661057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1647298.

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 225661057 is about 15022.0190720156. The cubic root of 225661057 is about 608.8152737780.

The spelling of 225661057 in words is "two hundred twenty-five million, six hundred sixty-one thousand, fifty-seven".