225582261 has 4 divisors (see below), whose sum is σ = 300776352. Its totient is φ = 150388172.

The previous prime is 225582223. The next prime is 225582289. The reversal of 225582261 is 162285522.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 225582261 - 2²⁶ = 158473397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225582211) 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, 37597041 + ... + 37597046.

It is an arithmetic number, because the mean of its divisors is an integer number (75194088).

Almost surely, 2^225582261 is an apocalyptic number.

It is an amenable number.

225582261 is a deficient number, since it is larger than the sum of its proper divisors (75194091).

225582261 is an equidigital number, since it uses as much as digits as its factorization.

225582261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75194090.

The product of its digits is 19200, while the sum is 33.

The square root of 225582261 is about 15019.3961596330. The cubic root of 225582261 is about 608.7444037844.

The spelling of 225582261 in words is "two hundred twenty-five million, five hundred eighty-two thousand, two hundred sixty-one".