16303261 has 6 divisors (see below), whose sum is σ = 17654010. Its totient is φ = 15049008.

The previous prime is 16303247. The next prime is 16303271. The reversal of 16303261 is 16230361.

It can be written as a sum of positive squares in 3 ways, for example, as 383161 + 15920100 = 619^2 + 3990^2 .

It is not a de Polignac number, because 16303261 - 2⁵ = 16303229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16303201) 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 5 ways as a sum of consecutive naturals, for example, 48066 + ... + 48403.

It is an arithmetic number, because the mean of its divisors is an integer number (2942335).

Almost surely, 2^16303261 is an apocalyptic number.

It is an amenable number.

16303261 is a deficient number, since it is larger than the sum of its proper divisors (1350749).

16303261 is an equidigital number, since it uses as much as digits as its factorization.

16303261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96495 (or 96482 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 16303261 is about 4037.7296838694. The cubic root of 16303261 is about 253.5662767754.

Subtracting from 16303261 its reverse (16230361), we obtain a square (72900 = 270²).

It can be divided in two parts, 1630 and 3261, that multiplied together give a triangular number (5315430 = T₃₂₆₀).

The spelling of 16303261 in words is "sixteen million, three hundred three thousand, two hundred sixty-one".