55111007 has 4 divisors (see below), whose sum is σ = 62984016. Its totient is φ = 47238000.

The previous prime is 55111003. The next prime is 55111009. The reversal of 55111007 is 70011155.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70011155 = 5 ⋅14002231.

It is a cyclic number.

It is not a de Polignac number, because 55111007 - 2² = 55111003 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55111007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55111003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3936494 + ... + 3936507.

It is an arithmetic number, because the mean of its divisors is an integer number (15746004).

Almost surely, 2^55111007 is an apocalyptic number.

55111007 is a deficient number, since it is larger than the sum of its proper divisors (7873009).

55111007 is an equidigital number, since it uses as much as digits as its factorization.

55111007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7873008.

The product of its (nonzero) digits is 175, while the sum is 20.

The square root of 55111007 is about 7423.6788050131. The cubic root of 55111007 is about 380.5509252575.

The spelling of 55111007 in words is "fifty-five million, one hundred eleven thousand, seven".