225521463 has 32 divisors (see below), whose sum is σ = 322983936. Its totient is φ = 139639808.

The previous prime is 225521449. The next prime is 225521467. The reversal of 225521463 is 364125522.

It is not a de Polignac number, because 225521463 - 2⁴ = 225521447 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 225521463.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225521467) 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 31 ways as a sum of consecutive naturals, for example, 638695 + ... + 639047.

It is an arithmetic number, because the mean of its divisors is an integer number (10093248).

Almost surely, 2^225521463 is an apocalyptic number.

225521463 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

225521463 is a deficient number, since it is larger than the sum of its proper divisors (97462473).

225521463 is a wasteful number, since it uses less digits than its factorization.

225521463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623.

The product of its digits is 14400, while the sum is 30.

The square root of 225521463 is about 15017.3720404071. The cubic root of 225521463 is about 608.6897101107.

Adding to 225521463 its reverse (364125522), we get a palindrome (589646985).

The spelling of 225521463 in words is "two hundred twenty-five million, five hundred twenty-one thousand, four hundred sixty-three".