225213533 has 8 divisors (see below), whose sum is σ = 233089080. Its totient is φ = 217451520.

The previous prime is 225213509. The next prime is 225213551. The reversal of 225213533 is 335312522.

It can be written as a sum of positive squares in 4 ways, for example, as 273529 + 224940004 = 523^2 + 14998^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-225213533 is a prime.

It is a super-2 number, since 2×225213533² = 101442270892684178, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225213503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24338 + ... + 32291.

It is an arithmetic number, because the mean of its divisors is an integer number (29136135).

Almost surely, 2^225213533 is an apocalyptic number.

It is an amenable number.

225213533 is a deficient number, since it is larger than the sum of its proper divisors (7875547).

225213533 is an equidigital number, since it uses as much as digits as its factorization.

225213533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56767.

The product of its digits is 5400, while the sum is 26.

The square root of 225213533 is about 15007.1160787141. The cubic root of 225213533 is about 608.4125462539.

The spelling of 225213533 in words is "two hundred twenty-five million, two hundred thirteen thousand, five hundred thirty-three".