225534521 has 4 divisors (see below), whose sum is σ = 229357200. Its totient is φ = 221711844.

The previous prime is 225534511. The next prime is 225534523. The reversal of 225534521 is 125435522.

225534521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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: 125435522 = 2 ⋅62717761.

It is a cyclic number.

It is not a de Polignac number, because 225534521 - 2⁶ = 225534457 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (225534523) 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, 1911251 + ... + 1911368.

It is an arithmetic number, because the mean of its divisors is an integer number (57339300).

Almost surely, 2^225534521 is an apocalyptic number.

It is an amenable number.

225534521 is a deficient number, since it is larger than the sum of its proper divisors (3822679).

225534521 is an equidigital number, since it uses as much as digits as its factorization.

225534521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3822678.

The product of its digits is 12000, while the sum is 29.

The square root of 225534521 is about 15017.8067972657. The cubic root of 225534521 is about 608.7014578718.

The spelling of 225534521 in words is "two hundred twenty-five million, five hundred thirty-four thousand, five hundred twenty-one".