55009550 has 24 divisors (see below), whose sum is σ = 102515016. Its totient is φ = 21961440.

The previous prime is 55009543. The next prime is 55009553. The reversal of 55009550 is 5590055.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55009553) 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, 44744 + ... + 45956.

It is an arithmetic number, because the mean of its divisors is an integer number (4271459).

Almost surely, 2^55009550 is an apocalyptic number.

55009550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55009550 is a deficient number, since it is larger than the sum of its proper divisors (47505466).

55009550 is a wasteful number, since it uses less digits than its factorization.

55009550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2132 (or 2127 counting only the distinct ones).

The product of its (nonzero) digits is 5625, while the sum is 29.

The square root of 55009550 is about 7416.8423200173. The cubic root of 55009550 is about 380.3172558302.

The spelling of 55009550 in words is "fifty-five million, nine thousand, five hundred fifty".