261626233 has 16 divisors (see below), whose sum is σ = 296087616. Its totient is φ = 229098240.

The previous prime is 261626231. The next prime is 261626249. The reversal of 261626233 is 332626162.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 261626233 - 2¹ = 261626231 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 261626195 and 261626204.

It is not an unprimeable number, because it can be changed into a prime (261626231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30741 + ... + 38317.

It is an arithmetic number, because the mean of its divisors is an integer number (18505476).

Almost surely, 2^261626233 is an apocalyptic number.

It is an amenable number.

261626233 is a deficient number, since it is larger than the sum of its proper divisors (34461383).

261626233 is a wasteful number, since it uses less digits than its factorization.

261626233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7704.

The product of its digits is 15552, while the sum is 31.

The square root of 261626233 is about 16174.8642343607. The cubic root of 261626233 is about 639.5783624192.

The spelling of 261626233 in words is "two hundred sixty-one million, six hundred twenty-six thousand, two hundred thirty-three".