Search a number
-
+
225053581 = 1915931987
BaseRepresentation
bin11010110101000…
…00101110001101
3120200110220110211
431122200232031
5430103203311
634155402421
75401631614
oct1532405615
9520426424
10225053581
111060450a5
1263453411
13378199cc
1421c6487b
1514b57821
hexd6a0b8d

225053581 has 8 divisors (see below), whose sum is σ = 226727424. Its totient is φ = 223385280.

The previous prime is 225053579. The next prime is 225053629. The reversal of 225053581 is 185350522.

225053581 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 225053581 - 21 = 225053579 is a prime.

It is a super-2 number, since 2×2250535812 = 101298228641847122, 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 (225053501) 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, 112270 + ... + 114256.

It is an arithmetic number, because the mean of its divisors is an integer number (28340928).

Almost surely, 2225053581 is an apocalyptic number.

It is an amenable number.

225053581 is a deficient number, since it is larger than the sum of its proper divisors (1673843).

225053581 is a wasteful number, since it uses less digits than its factorization.

225053581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2771.

The product of its (nonzero) digits is 12000, while the sum is 31.

The square root of 225053581 is about 15001.7859270155. The cubic root of 225053581 is about 608.2684757943.

The spelling of 225053581 in words is "two hundred twenty-five million, fifty-three thousand, five hundred eighty-one".

Divisors: 1 191 593 1987 113263 379517 1178291 225053581