225645431 has 8 divisors (see below), whose sum is σ = 247536000. Its totient is φ = 203984440.

The previous prime is 225645419. The next prime is 225645517. The reversal of 225645431 is 134546522.

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

It is a de Polignac number, because none of the positive numbers 2^k-225645431 is a prime.

It is a super-2 number, since 2×225645431² = 101831721062351522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225645331) 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 7 ways as a sum of consecutive naturals, for example, 55331 + ... + 59268.

It is an arithmetic number, because the mean of its divisors is an integer number (30942000).

Almost surely, 2^225645431 is an apocalyptic number.

225645431 is a deficient number, since it is larger than the sum of its proper divisors (21890569).

225645431 is a wasteful number, since it uses less digits than its factorization.

225645431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114789.

The product of its digits is 28800, while the sum is 32.

The square root of 225645431 is about 15021.4989598242. The cubic root of 225645431 is about 608.8012208924.

The spelling of 225645431 in words is "two hundred twenty-five million, six hundred forty-five thousand, four hundred thirty-one".