225522520146 has 48 divisors (see below), whose sum is σ = 609203694528. Its totient is φ = 58577277600.

The previous prime is 225522520123. The next prime is 225522520147. The reversal of 225522520146 is 641025225522.

225522520146 is a `hidden beast` number, since 22 + 55 + 22 + 520 + 1 + 46 = 666.

It is a super-2 number, since 2×225522520146² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 225522520146.

It is not an unprimeable number, because it can be changed into a prime (225522520147) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 81355945 + ... + 81358716.

It is an arithmetic number, because the mean of its divisors is an integer number (12691743636).

Almost surely, 2^225522520146 is an apocalyptic number.

225522520146 is an abundant number, since it is smaller than the sum of its proper divisors (383681174382).

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

225522520146 is a wasteful number, since it uses less digits than its factorization.

225522520146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162714687 (or 162714684 counting only the distinct ones).

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

Adding to 225522520146 its reverse (641025225522), we get a palindrome (866547745668).

The spelling of 225522520146 in words is "two hundred twenty-five billion, five hundred twenty-two million, five hundred twenty thousand, one hundred forty-six".