261325224 has 64 divisors (see below), whose sum is σ = 768614400. Its totient is φ = 81983232.

The previous prime is 261325189. The next prime is 261325231. The reversal of 261325224 is 422523162.

It is a happy number.

261325224 is a `hidden beast` number, since 2 + 6 + 132 + 522 + 4 = 666.

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

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 15 ways as a sum of consecutive naturals, for example, 31912 + ... + 39255.

It is an arithmetic number, because the mean of its divisors is an integer number (12009600).

Almost surely, 2^261325224 is an apocalyptic number.

261325224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

261325224 is an abundant number, since it is smaller than the sum of its proper divisors (507289176).

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

261325224 is a wasteful number, since it uses less digits than its factorization.

261325224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71199 (or 71189 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 261325224 is about 16165.5567179111. The cubic root of 261325224 is about 639.3329834534.

Adding to 261325224 its reverse (422523162), we get a palindrome (683848386).

The spelling of 261325224 in words is "two hundred sixty-one million, three hundred twenty-five thousand, two hundred twenty-four".