261344522 has 4 divisors (see below), whose sum is σ = 392016786. Its totient is φ = 130672260.

The previous prime is 261344521. The next prime is 261344543. The reversal of 261344522 is 225443162.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 178516321 + 82828201 = 13361^2 + 9101^2 .

It is not an unprimeable number, because it can be changed into a prime (261344521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65336129 + ... + 65336132.

Almost surely, 2^261344522 is an apocalyptic number.

261344522 is a deficient number, since it is larger than the sum of its proper divisors (130672264).

261344522 is a wasteful number, since it uses less digits than its factorization.

261344522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130672263.

The product of its digits is 11520, while the sum is 29.

The square root of 261344522 is about 16166.1535932330. The cubic root of 261344522 is about 639.3487206053.

Adding to 261344522 its reverse (225443162), we get a palindrome (486787684).

The spelling of 261344522 in words is "two hundred sixty-one million, three hundred forty-four thousand, five hundred twenty-two".