261214229 has 2 divisors, whose sum is σ = 261214230. Its totient is φ = 261214228.

The previous prime is 261214193. The next prime is 261214271. The reversal of 261214229 is 922412162.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 237468100 + 23746129 = 15410^2 + 4873^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-261214229 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 (261214729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130607114 + 130607115.

It is an arithmetic number, because the mean of its divisors is an integer number (130607115).

Almost surely, 2^261214229 is an apocalyptic number.

It is an amenable number.

261214229 is a deficient number, since it is larger than the sum of its proper divisors (1).

261214229 is an equidigital number, since it uses as much as digits as its factorization.

261214229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 29.

The square root of 261214229 is about 16162.1232825393. The cubic root of 261214229 is about 639.2424540960.

The spelling of 261214229 in words is "two hundred sixty-one million, two hundred fourteen thousand, two hundred twenty-nine".