261792222 has 32 divisors (see below), whose sum is σ = 570153600. Its totient is φ = 79819488.

The previous prime is 261792221. The next prime is 261792227. The reversal of 261792222 is 222297162.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261792221) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 36288 + ... + 42899.

It is an arithmetic number, because the mean of its divisors is an integer number (17817300).

Almost surely, 2^261792222 is an apocalyptic number.

261792222 is an abundant number, since it is smaller than the sum of its proper divisors (308361378).

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

261792222 is a wasteful number, since it uses less digits than its factorization.

261792222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79240.

The product of its digits is 12096, while the sum is 33.

The square root of 261792222 is about 16179.9944993810. The cubic root of 261792222 is about 639.7135941806.

The spelling of 261792222 in words is "two hundred sixty-one million, seven hundred ninety-two thousand, two hundred twenty-two".