61111055 has 4 divisors (see below), whose sum is σ = 73333272. Its totient is φ = 48888840.

The previous prime is 61111031. The next prime is 61111103. The reversal of 61111055 is 55011116.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 61111055 - 2⁸ = 61110799 is a prime.

It is a super-2 number, since 2×61111055² = 7469122086426050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6111101 + ... + 6111110.

It is an arithmetic number, because the mean of its divisors is an integer number (18333318).

Almost surely, 2^61111055 is an apocalyptic number.

61111055 is a deficient number, since it is larger than the sum of its proper divisors (12222217).

61111055 is a wasteful number, since it uses less digits than its factorization.

61111055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12222216.

The product of its (nonzero) digits is 150, while the sum is 20.

The square root of 61111055 is about 7817.3560108262. The cubic root of 61111055 is about 393.8884629354. Note that the first 3 decimals are identical.

The spelling of 61111055 in words is "sixty-one million, one hundred eleven thousand, fifty-five".