1315501020 has 48 divisors (see below), whose sum is σ = 4092671520. Its totient is φ = 350800128.

The previous prime is 1315501013. The next prime is 1315501037. The reversal of 1315501020 is 201055131.

1315501020 is a `hidden beast` number, since 13 + 1 + 550 + 102 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1315500984 and 1315501002.

It is a congruent number.

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, 1217517 + ... + 1218596.

It is an arithmetic number, because the mean of its divisors is an integer number (85263990).

Almost surely, 2^1315501020 is an apocalyptic number.

1315501020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1315501020 is an abundant number, since it is smaller than the sum of its proper divisors (2777170500).

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

1315501020 is a wasteful number, since it uses less digits than its factorization.

1315501020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2436131 (or 2436123 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 1315501020 is about 36269.8362279181. The cubic root of 1315501020 is about 1095.7136275178.

Adding to 1315501020 its reverse (201055131), we get a palindrome (1516556151).

The spelling of 1315501020 in words is "one billion, three hundred fifteen million, five hundred one thousand, twenty".