55117950 has 24 divisors (see below), whose sum is σ = 136692888. Its totient is φ = 14698080.

The previous prime is 55117949. The next prime is 55117957. The reversal of 55117950 is 5971155.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55117957) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 183577 + ... + 183876.

It is an arithmetic number, because the mean of its divisors is an integer number (5695537).

Almost surely, 2^55117950 is an apocalyptic number.

55117950 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55117950 is an abundant number, since it is smaller than the sum of its proper divisors (81574938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55117950 is a wasteful number, since it uses less digits than its factorization.

55117950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367468 (or 367463 counting only the distinct ones).

The product of its (nonzero) digits is 7875, while the sum is 33.

The square root of 55117950 is about 7424.1464155821. The cubic root of 55117950 is about 380.5669054537.

The spelling of 55117950 in words is "fifty-five million, one hundred seventeen thousand, nine hundred fifty".