261053203 has 4 divisors (see below), whose sum is σ = 261091080. Its totient is φ = 261015328.

The previous prime is 261053159. The next prime is 261053237. The reversal of 261053203 is 302350162.

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

It is a cyclic number.

It is not a de Polignac number, because 261053203 - 2²⁵ = 227498771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261053803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5350 + ... + 23467.

It is an arithmetic number, because the mean of its divisors is an integer number (65272770).

Almost surely, 2^261053203 is an apocalyptic number.

261053203 is a deficient number, since it is larger than the sum of its proper divisors (37877).

261053203 is an equidigital number, since it uses as much as digits as its factorization.

261053203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37876.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 261053203 is about 16157.1409290134. The cubic root of 261053203 is about 639.1110730268. Note that the first 3 decimals are identical.

The spelling of 261053203 in words is "two hundred sixty-one million, fifty-three thousand, two hundred three".