1313132520 has 64 divisors (see below), whose sum is σ = 4502171520. Its totient is φ = 300144384.

The previous prime is 1313132473. The next prime is 1313132539. The reversal of 1313132520 is 252313131.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 780787 + ... + 782466.

It is an arithmetic number, because the mean of its divisors is an integer number (70346430).

Almost surely, 2^1313132520 is an apocalyptic number.

1313132520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1313132520 is an abundant number, since it is smaller than the sum of its proper divisors (3189039000).

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

1313132520 is a wasteful number, since it uses less digits than its factorization.

1313132520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1563274 (or 1563270 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 1313132520 is about 36237.1704193360. The cubic root of 1313132520 is about 1095.0556382146.

Adding to 1313132520 its reverse (252313131), we get a palindrome (1565445651).

The spelling of 1313132520 in words is "one billion, three hundred thirteen million, one hundred thirty-two thousand, five hundred twenty".