1520532520 has 96 divisors (see below), whose sum is σ = 3733493400. Its totient is φ = 554029056.

The previous prime is 1520532511. The next prime is 1520532523. The reversal of 1520532520 is 252350251.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 104816644 + 1415715876 = 10238^2 + 37626^2 .

It is not an unprimeable number, because it can be changed into a prime (1520532523) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6639766 + ... + 6639994.

Almost surely, 2^1520532520 is an apocalyptic number.

1520532520 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 1520532520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1866746700).

1520532520 is an abundant number, since it is smaller than the sum of its proper divisors (2212960880).

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

1520532520 is a wasteful number, since it uses less digits than its factorization.

1520532520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479 (or 362 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 1520532520 is about 38994.0062060825. The cubic root of 1520532520 is about 1149.9136721587.

Adding to 1520532520 its reverse (252350251), we get a palindrome (1772882771).

The spelling of 1520532520 in words is "one billion, five hundred twenty million, five hundred thirty-two thousand, five hundred twenty".