1520455530 has 64 divisors (see below), whose sum is σ = 4025635200. Its totient is φ = 364446720.

The previous prime is 1520455523. The next prime is 1520455577. The reversal of 1520455530 is 355540251.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3486 + ... + 55254.

It is an arithmetic number, because the mean of its divisors is an integer number (62900550).

Almost surely, 2^1520455530 is an apocalyptic number.

1520455530 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 1520455530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2012817600).

1520455530 is an abundant number, since it is smaller than the sum of its proper divisors (2505179670).

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

1520455530 is a wasteful number, since it uses less digits than its factorization.

1520455530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51879.

The product of its (nonzero) digits is 15000, while the sum is 30.

The square root of 1520455530 is about 38993.0189905834. The cubic root of 1520455530 is about 1149.8942637504.

Adding to 1520455530 its reverse (355540251), we get a palindrome (1875995781).

The spelling of 1520455530 in words is "one billion, five hundred twenty million, four hundred fifty-five thousand, five hundred thirty".