261000033 has 16 divisors (see below), whose sum is σ = 397940736. Its totient is φ = 149058000.

The previous prime is 261000023. The next prime is 261000127. The reversal of 261000033 is 330000162.

It is not a de Polignac number, because 261000033 - 2⁶ = 260999969 is a prime.

It is a super-3 number, since 3×261000033³ (a number of 26 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 260999976 and 261000021.

It is not an unprimeable number, because it can be changed into a prime (261000013) 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, 66360 + ... + 70182.

It is an arithmetic number, because the mean of its divisors is an integer number (24871296).

Almost surely, 2^261000033 is an apocalyptic number.

It is an amenable number.

261000033 is a deficient number, since it is larger than the sum of its proper divisors (136940703).

261000033 is a wasteful number, since it uses less digits than its factorization.

261000033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7084.

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 261000033 is about 16155.4954427278. The cubic root of 261000033 is about 639.0676797738.

Adding to 261000033 its reverse (330000162), we get a palindrome (591000195).

The spelling of 261000033 in words is "two hundred sixty-one million, thirty-three", and thus it is an aban number.