225501570 has 144 divisors (see below), whose sum is σ = 697215168. Its totient is φ = 51438240.

The previous prime is 225501559. The next prime is 225501571. The reversal of 225501570 is 75105522.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (225501571) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 459025 + ... + 459515.

It is an arithmetic number, because the mean of its divisors is an integer number (4841772).

Almost surely, 2^225501570 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 225501570, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (348607584).

225501570 is an abundant number, since it is smaller than the sum of its proper divisors (471713598).

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

225501570 is an frugal number, since it uses more digits than its factorization.

225501570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529 (or 508 counting only the distinct ones).

The product of its (nonzero) digits is 3500, while the sum is 27.

The square root of 225501570 is about 15016.7096928721. The cubic root of 225501570 is about 608.6718123013.

The spelling of 225501570 in words is "two hundred twenty-five million, five hundred one thousand, five hundred seventy".