261242230 has 16 divisors (see below), whose sum is σ = 497897280. Its totient is φ = 98349952.

The previous prime is 261242221. The next prime is 261242263. The reversal of 261242230 is 32242162.

261242230 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 768190 + ... + 768529.

It is an arithmetic number, because the mean of its divisors is an integer number (31118580).

Almost surely, 2^261242230 is an apocalyptic number.

261242230 is a deficient number, since it is larger than the sum of its proper divisors (236655050).

261242230 is a wasteful number, since it uses less digits than its factorization.

261242230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1536743.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 261242230 is about 16162.9895130820. The cubic root of 261242230 is about 639.2652945930.

Adding to 261242230 its reverse (32242162), we get a palindrome (293484392).

The spelling of 261242230 in words is "two hundred sixty-one million, two hundred forty-two thousand, two hundred thirty".