261464213 has 2 divisors, whose sum is σ = 261464214. Its totient is φ = 261464212.

The previous prime is 261464129. The next prime is 261464221. The reversal of 261464213 is 312464162.

261464213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 202834564 + 58629649 = 14242^2 + 7657^2 .

It is a cyclic number.

It is not a de Polignac number, because 261464213 - 2⁸ = 261463957 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (261466213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130732106 + 130732107.

It is an arithmetic number, because the mean of its divisors is an integer number (130732107).

Almost surely, 2^261464213 is an apocalyptic number.

It is an amenable number.

261464213 is a deficient number, since it is larger than the sum of its proper divisors (1).

261464213 is an equidigital number, since it uses as much as digits as its factorization.

261464213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 29.

The square root of 261464213 is about 16169.8550704699. The cubic root of 261464213 is about 639.4463090399.

The spelling of 261464213 in words is "two hundred sixty-one million, four hundred sixty-four thousand, two hundred thirteen".