261304322 has 16 divisors (see below), whose sum is σ = 395508960. Its totient is φ = 129472992.

The previous prime is 261304279. The next prime is 261304339. The reversal of 261304322 is 223403162.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135638 + ... + 137550.

It is an arithmetic number, because the mean of its divisors is an integer number (24719310).

Almost surely, 2^261304322 is an apocalyptic number.

261304322 is a deficient number, since it is larger than the sum of its proper divisors (134204638).

261304322 is a wasteful number, since it uses less digits than its factorization.

261304322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2497.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 261304322 is about 16164.9102069885. The cubic root of 261304322 is about 639.3159373959.

Adding to 261304322 its reverse (223403162), we get a palindrome (484707484).

The spelling of 261304322 in words is "two hundred sixty-one million, three hundred four thousand, three hundred twenty-two".