226521045540 has 144 divisors (see below), whose sum is σ = 707369448240. Its totient is φ = 58632698880.

The previous prime is 226521045539. The next prime is 226521045547. The reversal of 226521045540 is 45540125622.

226521045540 is a `hidden beast` number, since 2 + 2 + 6 + 5 + 2 + 104 + 5 + 540 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 40565182464 + 185955863076 = 201408^2 + 431226^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 226521045495 and 226521045504.

It is not an unprimeable number, because it can be changed into a prime (226521045547) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2763466 + ... + 2844254.

It is an arithmetic number, because the mean of its divisors is an integer number (4912287835).

Almost surely, 2^226521045540 is an apocalyptic number.

226521045540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 226521045540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (353684724120).

226521045540 is an abundant number, since it is smaller than the sum of its proper divisors (480848402700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

226521045540 is a wasteful number, since it uses less digits than its factorization.

226521045540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81262 (or 81257 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 36.

The spelling of 226521045540 in words is "two hundred twenty-six billion, five hundred twenty-one million, forty-five thousand, five hundred forty".