225978493 has 8 divisors (see below), whose sum is σ = 243479936. Its totient is φ = 208494000.

The previous prime is 225978463. The next prime is 225978497. The reversal of 225978493 is 394879522.

225978493 is nontrivially palindromic in base 16.

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

It is not a de Polignac number, because 225978493 - 2⁵ = 225978461 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 (225978497) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43168 + ... + 48118.

It is an arithmetic number, because the mean of its divisors is an integer number (30434992).

Almost surely, 2^225978493 is an apocalyptic number.

It is an amenable number.

225978493 is a deficient number, since it is larger than the sum of its proper divisors (17501443).

225978493 is a wasteful number, since it uses less digits than its factorization.

225978493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8475.

The product of its digits is 1088640, while the sum is 49.

The square root of 225978493 is about 15032.5810491745. The cubic root of 225978493 is about 609.1006122400.

The spelling of 225978493 in words is "two hundred twenty-five million, nine hundred seventy-eight thousand, four hundred ninety-three".