1532513220 has 144 divisors (see below), whose sum is σ = 5008324608. Its totient is φ = 349117440.

The previous prime is 1532513209. The next prime is 1532513233. The reversal of 1532513220 is 223152351.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1125340 + ... + 1126700.

It is an arithmetic number, because the mean of its divisors is an integer number (34780032).

Almost surely, 2^1532513220 is an apocalyptic number.

1532513220 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 1532513220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2504162304).

1532513220 is an abundant number, since it is smaller than the sum of its proper divisors (3475811388).

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

1532513220 is a wasteful number, since it uses less digits than its factorization.

1532513220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1770 (or 1761 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 1532513220 is about 39147.3271118221. The cubic root of 1532513220 is about 1152.9259380239.

Adding to 1532513220 its reverse (223152351), we get a palindrome (1755665571).

The spelling of 1532513220 in words is "one billion, five hundred thirty-two million, five hundred thirteen thousand, two hundred twenty".