261330234 has 48 divisors (see below), whose sum is σ = 584327520. Its totient is φ = 77836000.

The previous prime is 261330203. The next prime is 261330247. The reversal of 261330234 is 432033162.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39784 + ... + 45884.

It is an arithmetic number, because the mean of its divisors is an integer number (12173490).

Almost surely, 2^261330234 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 261330234, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (292163760).

261330234 is an abundant number, since it is smaller than the sum of its proper divisors (322997286).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261330234 is a wasteful number, since it uses less digits than its factorization.

261330234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6187 (or 6176 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 24.

The square root of 261330234 is about 16165.7116762610. The cubic root of 261330234 is about 639.3370690875.

Adding to 261330234 its reverse (432033162), we get a palindrome (693363396).

The spelling of 261330234 in words is "two hundred sixty-one million, three hundred thirty thousand, two hundred thirty-four".