1315231005 has 64 divisors (see below), whose sum is σ = 2362348800. Its totient is φ = 619315200.

The previous prime is 1315231003. The next prime is 1315231007. The reversal of 1315231005 is 5001325131.

It is an interprime number because it is at equal distance from previous prime (1315231003) and next prime (1315231007).

It is not a de Polignac number, because 1315231005 - 2¹ = 1315231003 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1315231003) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2929021 + ... + 2929469.

It is an arithmetic number, because the mean of its divisors is an integer number (36911700).

Almost surely, 2^1315231005 is an apocalyptic number.

1315231005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1315231005 is a deficient number, since it is larger than the sum of its proper divisors (1047117795).

1315231005 is a wasteful number, since it uses less digits than its factorization.

1315231005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 942.

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 1315231005 is about 36266.1137289343. The cubic root of 1315231005 is about 1095.6386549775.

Adding to 1315231005 its reverse (5001325131), we get a palindrome (6316556136).

The spelling of 1315231005 in words is "one billion, three hundred fifteen million, two hundred thirty-one thousand, five".