225784531512 has 80 divisors (see below), whose sum is σ = 632934495600. Its totient is φ = 75198585600.

The previous prime is 225784531499. The next prime is 225784531519. The reversal of 225784531512 is 215135487522.

225784531512 is a `hidden beast` number, since 2 + 2 + 5 + 7 + 84 + 53 + 1 + 512 = 666.

It is a super-2 number, since 2×225784531512² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225784531519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 633189 + ... + 923307.

It is an arithmetic number, because the mean of its divisors is an integer number (7911681195).

Almost surely, 2^225784531512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 225784531512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (316467247800).

225784531512 is an abundant number, since it is smaller than the sum of its proper divisors (407149964088).

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

225784531512 is a wasteful number, since it uses less digits than its factorization.

225784531512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291338 (or 291325 counting only the distinct ones).

The product of its digits is 672000, while the sum is 45.

The spelling of 225784531512 in words is "two hundred twenty-five billion, seven hundred eighty-four million, five hundred thirty-one thousand, five hundred twelve".