261227830 has 8 divisors (see below), whose sum is σ = 470210112. Its totient is φ = 104491128.

The previous prime is 261227779. The next prime is 261227839. The reversal of 261227830 is 38722162.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 261227792 and 261227801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261227839) 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 3 ways as a sum of consecutive naturals, for example, 13061382 + ... + 13061401.

It is an arithmetic number, because the mean of its divisors is an integer number (58776264).

Almost surely, 2^261227830 is an apocalyptic number.

261227830 is a deficient number, since it is larger than the sum of its proper divisors (208982282).

261227830 is a wasteful number, since it uses less digits than its factorization.

261227830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26122790.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 261227830 is about 16162.5440447969. The cubic root of 261227830 is about 639.2535486751.

Adding to 261227830 its reverse (38722162), we get a palindrome (299949992).

The spelling of 261227830 in words is "two hundred sixty-one million, two hundred twenty-seven thousand, eight hundred thirty".