261216302 has 8 divisors (see below), whose sum is σ = 394228776. Its totient is φ = 129806712.

The previous prime is 261216269. The next prime is 261216331. The reversal of 261216302 is 203612162.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 400313 + ... + 400964.

It is an arithmetic number, because the mean of its divisors is an integer number (49278597).

Almost surely, 2^261216302 is an apocalyptic number.

261216302 is a deficient number, since it is larger than the sum of its proper divisors (133012474).

261216302 is a wasteful number, since it uses less digits than its factorization.

261216302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 801442.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 261216302 is about 16162.1874138373. The cubic root of 261216302 is about 639.2441451041.

Adding to 261216302 its reverse (203612162), we get a palindrome (464828464).

It can be divided in two parts, 26121 and 6302, that added together give a palindrome (32423).

The spelling of 261216302 in words is "two hundred sixty-one million, two hundred sixteen thousand, three hundred two".