225729686 has 16 divisors (see below), whose sum is σ = 416732064. Its totient is φ = 89299584.

The previous prime is 225729643. The next prime is 225729719. The reversal of 225729686 is 686927522.

It is a super-2 number, since 2×225729686² = 101907782283317192, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 225729686.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 619955 + ... + 620318.

It is an arithmetic number, because the mean of its divisors is an integer number (26045754).

Almost surely, 2^225729686 is an apocalyptic number.

225729686 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

225729686 is a deficient number, since it is larger than the sum of its proper divisors (191002378).

225729686 is a wasteful number, since it uses less digits than its factorization.

225729686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1240295.

The product of its digits is 725760, while the sum is 47.

The square root of 225729686 is about 15024.3031785171. The cubic root of 225729686 is about 608.8769860188.

The spelling of 225729686 in words is "two hundred twenty-five million, seven hundred twenty-nine thousand, six hundred eighty-six".