225400709 has 4 divisors (see below), whose sum is σ = 229221120. Its totient is φ = 221580300.

The previous prime is 225400697. The next prime is 225400729. The reversal of 225400709 is 907004522.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-225400709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225400729) 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 3 ways as a sum of consecutive naturals, for example, 1910117 + ... + 1910234.

It is an arithmetic number, because the mean of its divisors is an integer number (57305280).

Almost surely, 2^225400709 is an apocalyptic number.

It is an amenable number.

225400709 is a deficient number, since it is larger than the sum of its proper divisors (3820411).

225400709 is an equidigital number, since it uses as much as digits as its factorization.

225400709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3820410.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 225400709 is about 15013.3510250044. The cubic root of 225400709 is about 608.5810510665.

The spelling of 225400709 in words is "two hundred twenty-five million, four hundred thousand, seven hundred nine".