225221013 has 16 divisors (see below), whose sum is σ = 336101760. Its totient is φ = 149048928.

The previous prime is 225220993. The next prime is 225221023. The reversal of 225221013 is 310122522.

It is not a de Polignac number, because 225221013 - 2¹⁰ = 225219989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225221023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26745 + ... + 34142.

It is an arithmetic number, because the mean of its divisors is an integer number (21006360).

Almost surely, 2^225221013 is an apocalyptic number.

It is an amenable number.

225221013 is a deficient number, since it is larger than the sum of its proper divisors (110880747).

225221013 is a wasteful number, since it uses less digits than its factorization.

225221013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61033 (or 61027 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 225221013 is about 15007.3652917492. The cubic root of 225221013 is about 608.4192818992.

Adding to 225221013 its reverse (310122522), we get a palindrome (535343535).

The spelling of 225221013 in words is "two hundred twenty-five million, two hundred twenty-one thousand, thirteen".