261113203 has 4 divisors (see below), whose sum is σ = 281198848. Its totient is φ = 241027560.

The previous prime is 261113201. The next prime is 261113213. The reversal of 261113203 is 302311162.

261113203 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 261113203 - 2¹ = 261113201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261113201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10042803 + ... + 10042828.

It is an arithmetic number, because the mean of its divisors is an integer number (70299712).

Almost surely, 2^261113203 is an apocalyptic number.

261113203 is a deficient number, since it is larger than the sum of its proper divisors (20085645).

261113203 is a wasteful number, since it uses less digits than its factorization.

261113203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20085644.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 261113203 is about 16158.9975864841. The cubic root of 261113203 is about 639.1600333237.

Adding to 261113203 its reverse (302311162), we get a palindrome (563424365).

The spelling of 261113203 in words is "two hundred sixty-one million, one hundred thirteen thousand, two hundred three".