1315530520 has 32 divisors (see below), whose sum is σ = 2973237120. Its totient is φ = 523848960.

The previous prime is 1315530511. The next prime is 1315530577. The reversal of 1315530520 is 250355131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64821 + ... + 82660.

It is an arithmetic number, because the mean of its divisors is an integer number (92913660).

Almost surely, 2^1315530520 is an apocalyptic number.

1315530520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1315530520 is an abundant number, since it is smaller than the sum of its proper divisors (1657706600).

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

1315530520 is a wasteful number, since it uses less digits than its factorization.

1315530520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147715 (or 147711 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 25.

The square root of 1315530520 is about 36270.2428996554. The cubic root of 1315530520 is about 1095.7218178853.

Adding to 1315530520 its reverse (250355131), we get a palindrome (1565885651).

The spelling of 1315530520 in words is "one billion, three hundred fifteen million, five hundred thirty thousand, five hundred twenty".