55203550 has 24 divisors (see below), whose sum is σ = 108084600. Its totient is φ = 20918880.

The previous prime is 55203523. The next prime is 55203553. The reversal of 55203550 is 5530255.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55203553) 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, 28105 + ... + 30004.

It is an arithmetic number, because the mean of its divisors is an integer number (4503525).

Almost surely, 2^55203550 is an apocalyptic number.

55203550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55203550 is a deficient number, since it is larger than the sum of its proper divisors (52881050).

55203550 is a wasteful number, since it uses less digits than its factorization.

55203550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58140 (or 58135 counting only the distinct ones).

The product of its (nonzero) digits is 3750, while the sum is 25.

The square root of 55203550 is about 7429.9091515307. The cubic root of 55203550 is about 380.7638145520.

The spelling of 55203550 in words is "fifty-five million, two hundred three thousand, five hundred fifty".