261142230 has 32 divisors (see below), whose sum is σ = 653992704. Its totient is φ = 66610016.

The previous prime is 261142229. The next prime is 261142237. The reversal of 261142230 is 32241162.

It is a junction number, because it is equal to n+sod(n) for n = 261142197 and 261142206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261142237) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 188544 + ... + 189923.

It is an arithmetic number, because the mean of its divisors is an integer number (20437272).

Almost surely, 2^261142230 is an apocalyptic number.

261142230 is an abundant number, since it is smaller than the sum of its proper divisors (392850474).

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

261142230 is a wasteful number, since it uses less digits than its factorization.

261142230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378500.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 261142230 is about 16159.8957298616. The cubic root of 261142230 is about 639.1837168073.

Adding to 261142230 its reverse (32241162), we get a palindrome (293383392).

The spelling of 261142230 in words is "two hundred sixty-one million, one hundred forty-two thousand, two hundred thirty".