55116207 has 40 divisors (see below), whose sum is σ = 88281600. Its totient is φ = 34163856.

The previous prime is 55116203. The next prime is 55116221. The reversal of 55116207 is 70261155.

It is not a de Polignac number, because 55116207 - 2² = 55116203 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55116203) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 90498 + ... + 91104.

It is an arithmetic number, because the mean of its divisors is an integer number (2207040).

Almost surely, 2^55116207 is an apocalyptic number.

55116207 is a gapful number since it is divisible by the number (57) formed by its first and last digit.

55116207 is a deficient number, since it is larger than the sum of its proper divisors (33165393).

55116207 is a wasteful number, since it uses less digits than its factorization.

55116207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 697 (or 688 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 27.

The square root of 55116207 is about 7424.0290274217. The cubic root of 55116207 is about 380.5628938440.

The spelling of 55116207 in words is "fifty-five million, one hundred sixteen thousand, two hundred seven".