261132055 has 16 divisors (see below), whose sum is σ = 316653120. Its totient is φ = 206721792.

The previous prime is 261132049. The next prime is 261132059. The reversal of 261132055 is 550231162.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-261132055 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261132059) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 230731 + ... + 231859.

It is an arithmetic number, because the mean of its divisors is an integer number (19790820).

Almost surely, 2^261132055 is an apocalyptic number.

261132055 is a deficient number, since it is larger than the sum of its proper divisors (55521065).

261132055 is a wasteful number, since it uses less digits than its factorization.

261132055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1578.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 261132055 is about 16159.5809042190. The cubic root of 261132055 is about 639.1754151004.

The spelling of 261132055 in words is "two hundred sixty-one million, one hundred thirty-two thousand, fifty-five".