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225245245 = 561738509
BaseRepresentation
bin11010110110011…
…11100000111101
3120200211122101111
431123033200331
5430130321440
634203442021
75403360451
oct1533174075
9520748344
10225245245
111061660a5
1263526311
1337886014
1421cb4661
1514b944ea
hexd6cf83d

225245245 has 8 divisors (see below), whose sum is σ = 274725720. Its totient is φ = 177241920.

The previous prime is 225245239. The next prime is 225245249. The reversal of 225245245 is 542542522.

It can be written as a sum of positive squares in 4 ways, for example, as 155236 + 225090009 = 394^2 + 15003^2 .

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

It is not a de Polignac number, because 225245245 - 219 = 224720957 is a prime.

It is a super-2 number, since 2×2252452452 = 101470840790220050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225245249) 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, 368950 + ... + 369559.

It is an arithmetic number, because the mean of its divisors is an integer number (34340715).

Almost surely, 2225245245 is an apocalyptic number.

It is an amenable number.

225245245 is a deficient number, since it is larger than the sum of its proper divisors (49480475).

225245245 is an equidigital number, since it uses as much as digits as its factorization.

225245245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 738575.

The product of its digits is 32000, while the sum is 31.

The square root of 225245245 is about 15008.1726069499. The cubic root of 225245245 is about 608.4411014845.

Adding to 225245245 its reverse (542542522), we get a palindrome (767787767).

The spelling of 225245245 in words is "two hundred twenty-five million, two hundred forty-five thousand, two hundred forty-five".

Divisors: 1 5 61 305 738509 3692545 45049049 225245245