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225786631 = 7412712903
BaseRepresentation
bin11010111010100…
…11101100000111
3120201212011000211
431131103230013
5430300133011
634223220251
75411104030
oct1535235407
9521764024
10225786631
111064a5924
1263747687
1337a15575
1421db5a87
1514c4eb21
hexd753b07

225786631 has 16 divisors (see below), whose sum is σ = 265402368. Its totient is φ = 188049600.

The previous prime is 225786629. The next prime is 225786689. The reversal of 225786631 is 136687522.

It is a cyclic number.

It is not a de Polignac number, because 225786631 - 21 = 225786629 is a prime.

It is a super-2 number, since 2×2257866312 = 101959205476660322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225786601) 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, 76326 + ... + 79228.

It is an arithmetic number, because the mean of its divisors is an integer number (16587648).

Almost surely, 2225786631 is an apocalyptic number.

225786631 is a deficient number, since it is larger than the sum of its proper divisors (39615737).

225786631 is a wasteful number, since it uses less digits than its factorization.

225786631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3222.

The product of its digits is 120960, while the sum is 40.

The square root of 225786631 is about 15026.1981552221. The cubic root of 225786631 is about 608.9281823344.

It can be divided in two parts, 2257 and 86631, that added together give a palindrome (88888).

The spelling of 225786631 in words is "two hundred twenty-five million, seven hundred eighty-six thousand, six hundred thirty-one".

Divisors: 1 7 41 271 287 1897 2903 11111 20321 77777 119023 786713 833161 5506991 32255233 225786631