261051233 has 2 divisors, whose sum is σ = 261051234. Its totient is φ = 261051232.

The previous prime is 261051211. The next prime is 261051239. The reversal of 261051233 is 332150162.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 236913664 + 24137569 = 15392^2 + 4913^2 .

It is a cyclic number.

It is not a de Polignac number, because 261051233 - 2²⁶ = 193942369 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 261051199 and 261051208.

It is not a weakly prime, because it can be changed into another prime (261051239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130525616 + 130525617.

It is an arithmetic number, because the mean of its divisors is an integer number (130525617).

Almost surely, 2^261051233 is an apocalyptic number.

It is an amenable number.

261051233 is a deficient number, since it is larger than the sum of its proper divisors (1).

261051233 is an equidigital number, since it uses as much as digits as its factorization.

261051233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 261051233 is about 16157.0799651422. The cubic root of 261051233 is about 639.1094653699.

The spelling of 261051233 in words is "two hundred sixty-one million, fifty-one thousand, two hundred thirty-three".