225220034440 has 64 divisors (see below), whose sum is σ = 537292828800. Its totient is φ = 84671904768.

The previous prime is 225220034401. The next prime is 225220034441. The reversal of 225220034440 is 44430022522.

It is a super-2 number, since 2×225220034440² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 225220034399 and 225220034408.

It is not an unprimeable number, because it can be changed into a prime (225220034441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 266571 + ... + 722149.

It is an arithmetic number, because the mean of its divisors is an integer number (8395200450).

Almost surely, 2^225220034440 is an apocalyptic number.

225220034440 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 225220034440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (268646414400).

225220034440 is an abundant number, since it is smaller than the sum of its proper divisors (312072794360).

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

225220034440 is a wasteful number, since it uses less digits than its factorization.

225220034440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456334 (or 456330 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 28.

Adding to 225220034440 its reverse (44430022522), we get a palindrome (269650056962).

The spelling of 225220034440 in words is "two hundred twenty-five billion, two hundred twenty million, thirty-four thousand, four hundred forty".