1550320530 has 64 divisors (see below), whose sum is σ = 4077416448. Its totient is φ = 374132160.

The previous prime is 1550320529. The next prime is 1550320537. The reversal of 1550320530 is 350230551.

It is a self number, because there is not a number n which added to its sum of digits gives 1550320530.

It is not an unprimeable number, because it can be changed into a prime (1550320537) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 63057 + ... + 84123.

It is an arithmetic number, because the mean of its divisors is an integer number (63709632).

Almost surely, 2^1550320530 is an apocalyptic number.

1550320530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1550320530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2038708224).

1550320530 is an abundant number, since it is smaller than the sum of its proper divisors (2527095918).

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

1550320530 is a wasteful number, since it uses less digits than its factorization.

1550320530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21311.

The product of its (nonzero) digits is 2250, while the sum is 24.

The square root of 1550320530 is about 39374.1098947011. The cubic root of 1550320530 is about 1157.3742954453.

The spelling of 1550320530 in words is "one billion, five hundred fifty million, three hundred twenty thousand, five hundred thirty".