1320415550 has 24 divisors (see below), whose sum is σ = 2535200832. Its totient is φ = 511128000.

The previous prime is 1320415529. The next prime is 1320415597. The reversal of 1320415550 is 555140231.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 424391 + ... + 427490.

It is an arithmetic number, because the mean of its divisors is an integer number (105633368).

Almost surely, 2^1320415550 is an apocalyptic number.

1320415550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1320415550 is a deficient number, since it is larger than the sum of its proper divisors (1214785282).

1320415550 is a wasteful number, since it uses less digits than its factorization.

1320415550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 851924 (or 851919 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 1320415550 is about 36337.5226178120. The cubic root of 1320415550 is about 1097.0764100942.

Adding to 1320415550 its reverse (555140231), we get a palindrome (1875555781).

The spelling of 1320415550 in words is "one billion, three hundred twenty million, four hundred fifteen thousand, five hundred fifty".