225524212020 has 36 divisors (see below), whose sum is σ = 684090110340. Its totient is φ = 60139789824.

The previous prime is 225524211971. The next prime is 225524212037. The reversal of 225524212020 is 20212425522.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 65349764496 + 160174447524 = 255636^2 + 400218^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×225524212020² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 626455965 + ... + 626456324.

It is an arithmetic number, because the mean of its divisors is an integer number (19002503065).

Almost surely, 2^225524212020 is an apocalyptic number.

225524212020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

225524212020 is an abundant number, since it is smaller than the sum of its proper divisors (458565898320).

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

225524212020 is a wasteful number, since it uses less digits than its factorization.

225524212020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1252912304 (or 1252912299 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

Adding to 225524212020 its reverse (20212425522), we get a palindrome (245736637542).

The spelling of 225524212020 in words is "two hundred twenty-five billion, five hundred twenty-four million, two hundred twelve thousand, twenty".