225680637 has 16 divisors (see below), whose sum is σ = 370348160. Its totient is φ = 119040192.

The previous prime is 225680633. The next prime is 225680659. The reversal of 225680637 is 736086522.

It is not a de Polignac number, because 225680637 - 2² = 225680633 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 225680595 and 225680604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225680633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 413062 + ... + 413607.

It is an arithmetic number, because the mean of its divisors is an integer number (23146760).

Almost surely, 2^225680637 is an apocalyptic number.

It is an amenable number.

225680637 is a deficient number, since it is larger than the sum of its proper divisors (144667523).

225680637 is a wasteful number, since it uses less digits than its factorization.

225680637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 826692.

The product of its (nonzero) digits is 120960, while the sum is 39.

The square root of 225680637 is about 15022.6707678761. The cubic root of 225680637 is about 608.8328816873.

The spelling of 225680637 in words is "two hundred twenty-five million, six hundred eighty thousand, six hundred thirty-seven".