225302524420 has 24 divisors (see below), whose sum is σ = 473165746200. Its totient is φ = 90115210752.

The previous prime is 225302524417. The next prime is 225302524453. The reversal of 225302524420 is 24425203522.

It can be written as a sum of positive squares in 4 ways, for example, as 63455625216 + 161846899204 = 251904^2 + 402302^2 .

It is a super-2 number, since 2×225302524420² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36715 + ... + 672274.

It is an arithmetic number, because the mean of its divisors is an integer number (19715239425).

Almost surely, 2^225302524420 is an apocalyptic number.

225302524420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

225302524420 is an abundant number, since it is smaller than the sum of its proper divisors (247863221780).

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

225302524420 is a wasteful number, since it uses less digits than its factorization.

225302524420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 724887 (or 724885 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 31.

Adding to 225302524420 its reverse (24425203522), we get a palindrome (249727727942).

The spelling of 225302524420 in words is "two hundred twenty-five billion, three hundred two million, five hundred twenty-four thousand, four hundred twenty".