225471540 has 144 divisors (see below), whose sum is σ = 748766592. Its totient is φ = 50529024.

The previous prime is 225471517. The next prime is 225471551. The reversal of 225471540 is 45174522.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 225471498 and 225471507.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 155097 + ... + 156543.

It is an arithmetic number, because the mean of its divisors is an integer number (5199768).

Almost surely, 2^225471540 is an apocalyptic number.

225471540 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 225471540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (374383296).

225471540 is an abundant number, since it is smaller than the sum of its proper divisors (523295052).

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

225471540 is a wasteful number, since it uses less digits than its factorization.

225471540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1526 (or 1517 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 30.

The square root of 225471540 is about 15015.7097734340. The cubic root of 225471540 is about 608.6447921998.

The spelling of 225471540 in words is "two hundred twenty-five million, four hundred seventy-one thousand, five hundred forty".