225772447 has 4 divisors (see below), whose sum is σ = 228100096. Its totient is φ = 223444800.

The previous prime is 225772433. The next prime is 225772493. The reversal of 225772447 is 744277522.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 225772447 - 2²³ = 217383839 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 (225772147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1163679 + ... + 1163872.

It is an arithmetic number, because the mean of its divisors is an integer number (57025024).

Almost surely, 2^225772447 is an apocalyptic number.

225772447 is a deficient number, since it is larger than the sum of its proper divisors (2327649).

225772447 is an equidigital number, since it uses as much as digits as its factorization.

225772447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2327648.

The product of its digits is 219520, while the sum is 40.

The square root of 225772447 is about 15025.7261721356. The cubic root of 225772447 is about 608.9154310359.

The spelling of 225772447 in words is "two hundred twenty-five million, seven hundred seventy-two thousand, four hundred forty-seven".