194406225 has 48 divisors (see below), whose sum is σ = 354268992. Its totient is φ = 93461760.

The previous prime is 194406221. The next prime is 194406253. The reversal of 194406225 is 522604491.

It is not a de Polignac number, because 194406225 - 2² = 194406221 is a prime.

It is not an unprimeable number, because it can be changed into a prime (194406221) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 39607 + ... + 44243.

It is an arithmetic number, because the mean of its divisors is an integer number (7380604).

Almost surely, 2^194406225 is an apocalyptic number.

194406225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

194406225 is a deficient number, since it is larger than the sum of its proper divisors (159862767).

194406225 is a wasteful number, since it uses less digits than its factorization.

194406225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4706 (or 4701 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 194406225 is about 13942.9632790164. The cubic root of 194406225 is about 579.2998140013.

The spelling of 194406225 in words is "one hundred ninety-four million, four hundred six thousand, two hundred twenty-five".