225729497 has 4 divisors (see below), whose sum is σ = 257976576. Its totient is φ = 193482420.

The previous prime is 225729479. The next prime is 225729527. The reversal of 225729497 is 794927522.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 794927522 = 2 ⋅397463761.

It is a cyclic number.

It is not a de Polignac number, because 225729497 - 2⁸ = 225729241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225729407) 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, 16123529 + ... + 16123542.

It is an arithmetic number, because the mean of its divisors is an integer number (64494144).

Almost surely, 2^225729497 is an apocalyptic number.

It is an amenable number.

225729497 is a deficient number, since it is larger than the sum of its proper divisors (32247079).

225729497 is an equidigital number, since it uses as much as digits as its factorization.

225729497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32247078.

The product of its digits is 635040, while the sum is 47.

The square root of 225729497 is about 15024.2968887066. The cubic root of 225729497 is about 608.8768160843.

The spelling of 225729497 in words is "two hundred twenty-five million, seven hundred twenty-nine thousand, four hundred ninety-seven".