225251405 has 8 divisors (see below), whose sum is σ = 274109184. Its totient is φ = 177662800.

The previous prime is 225251399. The next prime is 225251413. The reversal of 225251405 is 504152522.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 225251405 - 2¹⁶ = 225185869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 316901 + ... + 317610.

It is an arithmetic number, because the mean of its divisors is an integer number (34263648).

Almost surely, 2^225251405 is an apocalyptic number.

It is an amenable number.

225251405 is a deficient number, since it is larger than the sum of its proper divisors (48857779).

225251405 is an equidigital number, since it uses as much as digits as its factorization.

225251405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634587.

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 225251405 is about 15008.3778270671. The cubic root of 225251405 is about 608.4466479768.

The spelling of 225251405 in words is "two hundred twenty-five million, two hundred fifty-one thousand, four hundred five".