261130523 has 16 divisors (see below), whose sum is σ = 293979456. Its totient is φ = 230630400.

The previous prime is 261130511. The next prime is 261130531. The reversal of 261130523 is 325031162.

It is a cyclic number.

It is not a de Polignac number, because 261130523 - 2⁶ = 261130459 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261136523) 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 15 ways as a sum of consecutive naturals, for example, 14423 + ... + 27023.

It is an arithmetic number, because the mean of its divisors is an integer number (18373716).

Almost surely, 2^261130523 is an apocalyptic number.

261130523 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

261130523 is a deficient number, since it is larger than the sum of its proper divisors (32848933).

261130523 is a wasteful number, since it uses less digits than its factorization.

261130523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12694.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 261130523 is about 16159.5335019301. The cubic root of 261130523 is about 639.1741651343.

Adding to 261130523 its reverse (325031162), we get a palindrome (586161685).

The spelling of 261130523 in words is "two hundred sixty-one million, one hundred thirty thousand, five hundred twenty-three".