226521045521 has 4 divisors (see below), whose sum is σ = 226529746944. Its totient is φ = 226512344100.

The previous prime is 226521045493. The next prime is 226521045539. The reversal of 226521045521 is 125540125622.

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 a de Polignac number, because none of the positive numbers 2^k-226521045521 is a prime.

It is a super-2 number, since 2×226521045521² (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 (226521045551) 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, 4311545 + ... + 4363766.

It is an arithmetic number, because the mean of its divisors is an integer number (56632436736).

Almost surely, 2^226521045521 is an apocalyptic number.

It is an amenable number.

226521045521 is a deficient number, since it is larger than the sum of its proper divisors (8701423).

226521045521 is an equidigital number, since it uses as much as digits as its factorization.

226521045521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8701422.

The product of its (nonzero) digits is 48000, while the sum is 35.

The spelling of 226521045521 in words is "two hundred twenty-six billion, five hundred twenty-one million, forty-five thousand, five hundred twenty-one".