225522643 has 4 divisors (see below), whose sum is σ = 228377440. Its totient is φ = 222667848.

The previous prime is 225522631. The next prime is 225522667. The reversal of 225522643 is 346225522.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 346225522 = 2 ⋅173112761.

It is a cyclic number.

It is not a de Polignac number, because 225522643 - 2⁵ = 225522611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225522443) 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, 1427280 + ... + 1427437.

It is an arithmetic number, because the mean of its divisors is an integer number (57094360).

Almost surely, 2^225522643 is an apocalyptic number.

225522643 is a deficient number, since it is larger than the sum of its proper divisors (2854797).

225522643 is an equidigital number, since it uses as much as digits as its factorization.

225522643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2854796.

The product of its digits is 28800, while the sum is 31.

The square root of 225522643 is about 15017.4113281884. The cubic root of 225522643 is about 608.6907717282.

The spelling of 225522643 in words is "two hundred twenty-five million, five hundred twenty-two thousand, six hundred forty-three".