261230356 has 6 divisors (see below), whose sum is σ = 457153130. Its totient is φ = 130615176.

The previous prime is 261230353. The next prime is 261230357. The reversal of 261230356 is 653032162.

261230356 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 142420356 + 118810000 = 11934^2 + 10900^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261230353) 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, 32653791 + ... + 32653798.

Almost surely, 2^261230356 is an apocalyptic number.

It is an amenable number.

261230356 is a deficient number, since it is larger than the sum of its proper divisors (195922774).

261230356 is a wasteful number, since it uses less digits than its factorization.

261230356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65307593 (or 65307591 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 261230356 is about 16162.6221882466. The cubic root of 261230356 is about 639.2556091361.

The spelling of 261230356 in words is "two hundred sixty-one million, two hundred thirty thousand, three hundred fifty-six".