261141533 has 4 divisors (see below), whose sum is σ = 261487260. Its totient is φ = 260795808.

The previous prime is 261141527. The next prime is 261141571. The reversal of 261141533 is 335141162.

261141533 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 can be written as a sum of positive squares in 2 ways, for example, as 227466724 + 33674809 = 15082^2 + 5803^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-261141533 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261141733) 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, 171728 + ... + 173241.

It is an arithmetic number, because the mean of its divisors is an integer number (65371815).

Almost surely, 2^261141533 is an apocalyptic number.

It is an amenable number.

261141533 is a deficient number, since it is larger than the sum of its proper divisors (345727).

261141533 is an equidigital number, since it uses as much as digits as its factorization.

261141533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345726.

The product of its digits is 2160, while the sum is 26.

The square root of 261141533 is about 16159.8741641140. The cubic root of 261141533 is about 639.1831481371.

Adding to 261141533 its reverse (335141162), we get a palindrome (596282695).

It can be divided in two parts, 2611 and 41533, that added together give a palindrome (44144).

The spelling of 261141533 in words is "two hundred sixty-one million, one hundred forty-one thousand, five hundred thirty-three".