261841822 has 24 divisors (see below), whose sum is σ = 443397528. Its totient is φ = 115798320.

The previous prime is 261841813. The next prime is 261841861. The reversal of 261841822 is 228148162.

It is a super-2 number, since 2×261841822² = 137122279496559368, which contains 22 as substring.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5668 + ... + 23575.

It is an arithmetic number, because the mean of its divisors is an integer number (18474897).

Almost surely, 2^261841822 is an apocalyptic number.

261841822 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

261841822 is a deficient number, since it is larger than the sum of its proper divisors (181555706).

261841822 is a wasteful number, since it uses less digits than its factorization.

261841822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29304 (or 29293 counting only the distinct ones).

The product of its digits is 12288, while the sum is 34.

The square root of 261841822 is about 16181.5271837982. The cubic root of 261841822 is about 639.7539923641.

Adding to 261841822 its reverse (228148162), we get a palindrome (489989984).

The spelling of 261841822 in words is "two hundred sixty-one million, eight hundred forty-one thousand, eight hundred twenty-two".