261088351 has 2 divisors, whose sum is σ = 261088352. Its totient is φ = 261088350.

The previous prime is 261088343. The next prime is 261088403. The reversal of 261088351 is 153880162.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 261088351 - 2³ = 261088343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (261088651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130544175 + 130544176.

It is an arithmetic number, because the mean of its divisors is an integer number (130544176).

Almost surely, 2^261088351 is an apocalyptic number.

261088351 is a deficient number, since it is larger than the sum of its proper divisors (1).

261088351 is an equidigital number, since it uses as much as digits as its factorization.

261088351 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 261088351 is about 16158.2285848418. The cubic root of 261088351 is about 639.1397548787.

The spelling of 261088351 in words is "two hundred sixty-one million, eighty-eight thousand, three hundred fifty-one".