1550055320 has 64 divisors (see below), whose sum is σ = 3834777600. Its totient is φ = 559198080.

The previous prime is 1550055313. The next prime is 1550055349. The reversal of 1550055320 is 235500551.

It is a self number, because there is not a number n which added to its sum of digits gives 1550055320.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42011 + ... + 69749.

It is an arithmetic number, because the mean of its divisors is an integer number (59918400).

Almost surely, 2^1550055320 is an apocalyptic number.

1550055320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1550055320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1917388800).

1550055320 is an abundant number, since it is smaller than the sum of its proper divisors (2284722280).

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

1550055320 is a wasteful number, since it uses less digits than its factorization.

1550055320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27888 (or 27884 counting only the distinct ones).

The product of its (nonzero) digits is 3750, while the sum is 26.

The square root of 1550055320 is about 39370.7419284930. The cubic root of 1550055320 is about 1157.3082951708.

Adding to 1550055320 its reverse (235500551), we get a palindrome (1785555871).

The spelling of 1550055320 in words is "one billion, five hundred fifty million, fifty-five thousand, three hundred twenty".