55011261 has 8 divisors (see below), whose sum is σ = 73465344. Its totient is φ = 36615680.

The previous prime is 55011227. The next prime is 55011277. The reversal of 55011261 is 16211055.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55011261 - 2²⁵ = 21456829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55011461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12381 + ... + 16226.

It is an arithmetic number, because the mean of its divisors is an integer number (9183168).

Almost surely, 2^55011261 is an apocalyptic number.

It is an amenable number.

55011261 is a deficient number, since it is larger than the sum of its proper divisors (18454083).

55011261 is a wasteful number, since it uses less digits than its factorization.

55011261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29251.

The product of its (nonzero) digits is 300, while the sum is 21.

The square root of 55011261 is about 7416.9576647032. The cubic root of 55011261 is about 380.3211988793.

It can be divided in two parts, 550 and 11261, that added together give a palindrome (11811).

The spelling of 55011261 in words is "fifty-five million, eleven thousand, two hundred sixty-one".