261044433 has 12 divisors (see below), whose sum is σ = 406069300. Its totient is φ = 160642656.

The previous prime is 261044431. The next prime is 261044447. The reversal of 261044433 is 334440162.

261044433 is a `hidden beast` number, since 2 + 610 + 4 + 4 + 43 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 94711824 + 166332609 = 9732^2 + 12897^2 .

It is not a de Polignac number, because 261044433 - 2¹ = 261044431 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 261044397 and 261044406.

It is not an unprimeable number, because it can be changed into a prime (261044431) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1115458 + ... + 1115691.

Almost surely, 2^261044433 is an apocalyptic number.

It is an amenable number.

261044433 is a deficient number, since it is larger than the sum of its proper divisors (145024867).

261044433 is a wasteful number, since it uses less digits than its factorization.

261044433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2231168 (or 2231165 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

The square root of 261044433 is about 16156.8695297078. The cubic root of 261044433 is about 639.1039160351.

Adding to 261044433 its reverse (334440162), we get a palindrome (595484595).

The spelling of 261044433 in words is "two hundred sixty-one million, forty-four thousand, four hundred thirty-three".