61200055 has 16 divisors (see below), whose sum is σ = 84135744. Its totient is φ = 41863680.

The previous prime is 61200053. The next prime is 61200071. The reversal of 61200055 is 55000216.

It is a happy number.

It is not a de Polignac number, because 61200055 - 2¹ = 61200053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61200053) 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 15 ways as a sum of consecutive naturals, for example, 14239 + ... + 18031.

It is an arithmetic number, because the mean of its divisors is an integer number (5258484).

Almost surely, 2^61200055 is an apocalyptic number.

61200055 is a deficient number, since it is larger than the sum of its proper divisors (22935689).

61200055 is a wasteful number, since it uses less digits than its factorization.

61200055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4266.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 61200055 is about 7823.0464014986. The cubic root of 61200055 is about 394.0795853044.

The spelling of 61200055 in words is "sixty-one million, two hundred thousand, fifty-five".