261099223 has 8 divisors (see below), whose sum is σ = 325526400. Its totient is φ = 203453880.

The previous prime is 261099217. The next prime is 261099257. The reversal of 261099223 is 322990162.

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

It is not a de Polignac number, because 261099223 - 2⁵ = 261099191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261099283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1695373 + ... + 1695526.

It is an arithmetic number, because the mean of its divisors is an integer number (40690800).

Almost surely, 2^261099223 is an apocalyptic number.

261099223 is a deficient number, since it is larger than the sum of its proper divisors (64427177).

261099223 is a wasteful number, since it uses less digits than its factorization.

261099223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3390917.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 261099223 is about 16158.5650043560. The cubic root of 261099223 is about 639.1486262447.

The spelling of 261099223 in words is "two hundred sixty-one million, ninety-nine thousand, two hundred twenty-three".