55330450 has 48 divisors (see below), whose sum is σ = 118742400. Its totient is φ = 18789120.

The previous prime is 55330439. The next prime is 55330453. The reversal of 55330450 is 5403355.

55330450 = T₁₁₇₇ + T₁₁₇₈ + ... + T₁₂₅₁.

It is a happy number.

It is a super-2 number, since 2×55330450² = 6122917394405000, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (55330453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38851 + ... + 40249.

It is an arithmetic number, because the mean of its divisors is an integer number (2473800).

Almost surely, 2^55330450 is an apocalyptic number.

55330450 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55330450 is an abundant number, since it is smaller than the sum of its proper divisors (63411950).

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

55330450 is a wasteful number, since it uses less digits than its factorization.

55330450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1531 (or 1526 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 25.

The square root of 55330450 is about 7438.4440577314. Note that the first 3 decimals coincide. The cubic root of 55330450 is about 381.0553534757.

The spelling of 55330450 in words is "fifty-five million, three hundred thirty thousand, four hundred fifty".