225259021 has 8 divisors (see below), whose sum is σ = 242796960. Its totient is φ = 207751152.

The previous prime is 225258977. The next prime is 225259049. The reversal of 225259021 is 120952522.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 225259021 - 2¹³ = 225250829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225259721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9486 + ... + 23248.

It is an arithmetic number, because the mean of its divisors is an integer number (30349620).

Almost surely, 2^225259021 is an apocalyptic number.

It is an amenable number.

225259021 is a deficient number, since it is larger than the sum of its proper divisors (17537939).

225259021 is a wasteful number, since it uses less digits than its factorization.

225259021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15035.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 225259021 is about 15008.6315498782. The cubic root of 225259021 is about 608.4535053183.

The spelling of 225259021 in words is "two hundred twenty-five million, two hundred fifty-nine thousand, twenty-one".