245521224 has 96 divisors (see below), whose sum is σ = 718918200. Its totient is φ = 75248640.

The previous prime is 245521223. The next prime is 245521261. The reversal of 245521224 is 422125542.

It can be written as a sum of positive squares in 4 ways, for example, as 103673124 + 141848100 = 10182^2 + 11910^2 .

It is not an unprimeable number, because it can be changed into a prime (245521223) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 431212 + ... + 431780.

Almost surely, 2^245521224 is an apocalyptic number.

245521224 is a gapful number since it is divisible by the number (24) 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 245521224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (359459100).

245521224 is an abundant number, since it is smaller than the sum of its proper divisors (473396976).

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

245521224 is a wasteful number, since it uses less digits than its factorization.

245521224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1055 (or 1048 counting only the distinct ones).

The product of its digits is 6400, while the sum is 27.

The square root of 245521224 is about 15669.1168864107. The cubic root of 245521224 is about 626.1758973837.

Adding to 245521224 its reverse (422125542), we get a palindrome (667646766).

The spelling of 245521224 in words is "two hundred forty-five million, five hundred twenty-one thousand, two hundred twenty-four".