225022145521 has 4 divisors (see below), whose sum is σ = 227733255792. Its totient is φ = 222311035252.

The previous prime is 225022145449. The next prime is 225022145563. The reversal of 225022145521 is 125541220522.

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.

It is a cyclic number.

It is not a de Polignac number, because 225022145521 - 2⁹ = 225022145009 is a prime.

It is a super-2 number, since 2×225022145521² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225022145021) 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, 1355555011 + ... + 1355555176.

It is an arithmetic number, because the mean of its divisors is an integer number (56933313948).

Almost surely, 2^225022145521 is an apocalyptic number.

It is an amenable number.

225022145521 is a deficient number, since it is larger than the sum of its proper divisors (2711110271).

225022145521 is an equidigital number, since it uses as much as digits as its factorization.

225022145521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2711110270.

The product of its (nonzero) digits is 16000, while the sum is 31.

The spelling of 225022145521 in words is "two hundred twenty-five billion, twenty-two million, one hundred forty-five thousand, five hundred twenty-one".