261099222 has 8 divisors (see below), whose sum is σ = 522198456. Its totient is φ = 87033072.

The previous prime is 261099217. The next prime is 261099257. The reversal of 261099222 is 222990162.

261099222 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

261099222 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21758263 + ... + 21758274.

It is an arithmetic number, because the mean of its divisors is an integer number (65274807).

Almost surely, 2^261099222 is an apocalyptic number.

261099222 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

261099222 is a wasteful number, since it uses less digits than its factorization.

261099222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43516542.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 261099222 is about 16158.5649734127. The cubic root of 261099222 is about 639.1486254288.

The spelling of 261099222 in words is "two hundred sixty-one million, ninety-nine thousand, two hundred twenty-two".